In: Statistics and Probability
In the following examples, indicate whether you would perform a t-test of independent means or dependent means.
a. Two groups were exposed to different levels of treatment for ankle sprains. Which treatment was more effective?
b. A researcher in nursing wanted to know whether patients who received additional in-home care recovered more quickly than others who received the standard amount of in-home care.
c. A group of adolescent boys was offered interpersonal skills counseling and then tested in September and May to see if there was any impact on family harmony.
d. One group of adult men was given instructions for reducing their high blood pressure whereas another group was not given any instructions, and the blood pressure of men in both groups was measured before and after.
e. One group of men was' provided access to an exercise program and tested two times over a 6-month period for heart health.
In: Statistics and Probability
Q8. Using the Student's distribution table, answer the following questions: a) In order to examine whether the socio-economic levels of families have an impact on the development of children, the height of the boys of the same age from the families with high and low socioeconomic level was measured and the following findings were obtained.
|
High |
Low |
|||
|
Ẋ |
S |
Ẋ |
S |
|
|
Height (cm) |
107.4 |
6 |
104.2 |
5 |
|
Number of children |
30 |
40 |
||
Since it is known that it fits the normal distribution in both distributions, are the lengths of these two groups of children different? First write the hypothesis and test it at the error level of α = 0.05 and interpret the results.
b) A researcher who investigates whether the order of birth affects the intelligence level of the child or not, acquires the following findings as a result of the intelligence test applied on the children.
|
Birth in the first 3 |
Birth in the 4th and above |
|
|
Ẋ |
110 points |
105 points |
|
S |
10 points |
12 points |
|
Number of children |
30 |
32 |
In: Statistics and Probability
Q1 = (P / 4)
Q2 = [(30 – P) / 2]
Where P is measured in dollars and Q is the number of T-shirts sold per year.
|
Wage (per year) |
Quantity Supplied (New (Job seekers) |
Quantity Demanded (New Job Seekers) |
|
$45,000 |
200,000 |
325,000 |
|
40,000 |
220,000 |
220,000 |
|
35,000 |
250,000 |
310,000 |
|
30,000 |
290,000 |
290,000 |
|
25,000 |
370,000 |
200,000 |
|
Price of imported trucks |
Quantity of imported trucks (thousands) |
|
|
|
Quantity Demanded |
Quantity Supplied |
|
$32,000 |
100 |
400 |
|
31,000 |
200 |
350 |
|
30,000 |
300 |
300 |
|
29,000 |
400 |
250 |
|
28,000 |
500 |
200 |
|
27,000 |
600 |
150 |
In: Economics
You joined Digitech in Cambridge as the Chief Innovation Officer four years ago, and since then the company has been undergoing significant changes. Although known for its computer software, with a worldwide reputation for a smaller company, the leadership has been looking to expand the work in the social sector. You have been actively searching for ways that Digitech could get more involved with public-private partnerships and the board has proposed a wide variety of initiatives from promoting computer literacy in the US public school system to improving technology access in developing countries. You and the board have decided to create a new position to help you start and manage these initiatives, Director of Public and Non-Profit Partnerships. However, you have been having a hard time finding someone to lead the new department. A couple weeks ago, you ran into another parent, Jordan Webb at a fundraiser for your child’s pre-school. Jordan is finishing a graduate degree, but previously worked for one of your rivals, Alpine Technology, as the Manager for International Business Strategy. Jordan really wants to stay in the Boston area due to family ties and seemed enthusiastic about a potential job leading public-private partnerships at their old company. Because of this enthusiasm, you thought Jordan might be a great fit for Digitech and after talking more they appear to be a perfect fit: experience in the tech industry, familiar with a similar sized organization, and additional education to support this interest. Jordan came through for informal interviews with your executives and everyone came away with a positive impression, wanting to offer Jordan the job as Director of Public and Non-Profit Partnerships. You called Jordan to share this news and promised to send a follow-up email to figure out the terms. You checked in with the Vice President of Human Resources (VP of HR) at Digitech to find out what kind of package you may be able to offer. She informed you that the going salary range for the incoming director working on nonprofit public-private partnerships would be around $70,000-$100,000, and she would prefer you to negotiate an agreement at the lower end of the range, since public and non-profit partnerships are unlikely to generate much revenue for Digitech. This would be a substantial pay cut from Jordan’s previous position with Alpine Technologies, which you are guessing would have paid in the range of $150,000 to $200,000. You told the VP of HR that although the salary range she presented seems fair, you may not be able to attract Jordan without providing additional incentives. The VP of HR responded by describing the standard benefits package offered to Digitech employees: 4 weeks of paid vacation plus select holidays off, full individual health coverage with all premiums paid by Digitech (family coverage requires employees to make a $350/month contribution; employees who waive all employer-sponsored health insurance coverage can get a rebate from Digitech for $5,000 per year). Digitech also matches employee 401k retirement contributions by 50%, for up to 6% of an employee’s base salary. Finally, Digitech does not give tuition reimbursement to employees. The VP of HR let you know that these standard benefits are offered to all employees and no exceptions can be made. When you pressed the VP of HR to increase the amount you can offer for salary, or to allow you to offer a year-end bonus, she was very unenthusiastic. She explained that year-end bonuses are tied to the profitability of each department, and since this new department would work primarily with non-profit or government partners, it is unlikely to be highly profitable. However, she did finally agree to authorize you to use up to $20,000 in extra money, to be offered at your discretion--as a signing bonus, to reimburse moving costs, or for whatever purpose seems most appropriate. You would prefer not to have to offer any extra money beyond the base salary, unless you think it absolutely necessary to convince Jordan to join you. Digitech has a very strong office culture and employees are expected to work out of the office in Cambridge so they can interact with colleagues, except when on business trips. The company was founded on the belief that making personal connections and being able to directly turn to colleagues for immediate, personal feedback are key pillars to success. Employees are given one flex day per week in the summer months (when they can work at home or reduce their hours by working extra hours other days of the week), but the rest of the year most employees work 5 days per week from the office. You did allow two employees to work from home one day per week last year (one had a new baby and the other was caring for an elderly parent); however, you are reluctant to allow this to spread too widely for fear your strong office culture may be damaged. You expect Jordan’s position to require travel once every month or so, to meet with partners in other locations. However, you are open to Jordan conducting most meetings via teleconference. You expect that this new position will be fairly demanding, especially in the first year, but you hope the opportunity to create a new department, as well as the prestige and focus of this new job, will be worth it. You want to make sure that the person you hire is really a team player. That is one of the reasons you are so excited to hire Jordan. Recently, one of the board members suggested you consider his best friend’s daughter, Robin, who is about to graduate with an MBA. At the advice of the board member, you hired Robin as a summer intern last summer, and were very unimpressed. You felt Robin lacked sufficient experience and was not very proactive, waiting to be guided in each activity. Robin also went on vacation halfway through the summer and left a project unfinished. You are a little worried that if you do not lock in someone else for the new job soon, the board member will push you to consider Robin more seriously; you would really like to avoid this if at all possible. Because Digitech’s lawyers need time to structure the public-private partnership agreements, you would prefer Jordan start in early to mid-July. However, Jordan has been so enthusiastic that if Jordan really wants to start immediately after graduation, you will try to be flexible.
You are now getting ready to send an email to Jordan to try to reach an agreement on the terms of employment. Prepare for and conduct your negotiation with Jordan. What would you do to convince Jordan to work for your company in your email?
In: Operations Management
Please create a python module named homework.py and implement the classes and methods outlined below. Below you will find an explanation for each class and method you need to implement. When you are done please upload the file homework.py to Grader Than. Please get started as soon as possible on this assignment. This assignment has many problems, it may take you longer than normal to complete this assignment. This assignment is supposed to represent a group of students in a course. A group of students in a course will be assigned an assignment and produce a collection of assignment results. The results will be used to figure out grade statistics. The grade they receive for their work on the assignment is entirely dependant on the student's energy level. If the student works on many assignments without sleeping their grade will suffer. You will implement four classes (Assignment, AssignmentResult, Student, and Course), they will depend on each other in the order they are listed. Hint: Work on the methods in the order they are found in the documentation below, implement the getter and setter methods before the more complicated methods. Work on the Assignment class, AssignmentResult class, Student class and Course class in that order. Class Assignment This object represents a school assignment that a student will work on.
__init__(self, name: str, difficulty: float):
""" Constructs an assignment with the given assignment name and a float that indicates the level of difficulty of the assignment. :param name: The name of the assignment :param difficulty: The level of difficulty of the assignment
"""
name(self) -> str:
"""
Returns the name of the assignment as specified in the constructor. :return: The assignment name
"""
difficulty(self) -> str:
"""
Returns the level of difficulty of the assignment as specified in the constructor. :return: The assignment level
"""
__str__(self) -> str:
"""
Returns the name of the assignment as specified in the constructor. :return: The assignment name
"""
Class AssignmentResult An object that represents the result of an assignment.
__init__(self, id:int, assignment: Assignment, grade: float):
"""
This will contain the ID of the student, the assignment that the student worked on and the grade the student received on the assignment. :param id: The ID of the student that created this Assignment result :param assignment: The Assignment that the student worked on. :param grade: A number between 0-1 representing the numerical grade the student received
"""
id(self) -> int:
"""
Returns the ID of the student as specified in the constructor. :return: The student's ID
"""
grade(self) -> float:
""" Returns the grade as specified in the constructor. :return: The grade the student received for this assignment
"""
assignment(self) -> Assignment:
""" Returns the assignment as specified in the constructor. :return: The assignment that the student worked on to create this result
"""
Class Student This class represents a single student
__init__(self, id: int, fist_name: str, last_name: str, town:str):
"""
This creates a student object with the specified ID first and last name and home town. This constructor should also create data structure for holding the students grades for all of there assignments. Additionally it should create a variable that holds the student's energy level which will be a number between 0 and 1. :param id: The student's identifiaction number :param fist_name: The student's first name :param last_name: The student's last name :param town: The student's home town
"""
id(self)->int:
"""
Returns the ID of the student as specified in the constructor. :return: The student's ID """ first_name(self) -> str: """ Returns the first name of the student. :return: The student's first name """ set_first_name(self, name:str): """ Changes the student first name to the specified value of the name parameter. :param name: The value that the first name of the student will equal. """ last_name(self) -> str:
"""
Returns the last name of the student. :return: The student's last name """ set_last_name(self, name: str):
"""
Changes the student last name to the specified value of the name parameter. :param name: The value that the last name of the student will equal.
"""
town(self) -> str:
""" Returns the hometown of the student. :return: The student's town name
"""
set_town(self, town: str):
""" Changes the student's hometown to the specified value of the town parameter. :param name: The value that the hometown of the student will equal.
"""
__str__(self) ->str:
"""
Returns a string containing the student's first and last name separated by a space. :return: Returns a string of the full name of the student
"""
grade(self)->float:
"""
Calculates a an average grade based off of the student's past assignment's grades. The lowest grade is not included in the grade calculation if the student has been assigned to two or more assignments in the past. See assign() for more detains. If the student has not been assigned any assignments in the pass this should return 0. :return: A number between 0-1 indicating the student's grade
"""
assign(self, assignment:Assignment) -> AssignmentResult:
"""
This function is to simulate the process of the student receiving an assignment, then working on the assignment, then submitting the assignment and finally receiving grade for the assignment. This function will receive an assignment then a grade should be calculated using the following formula: grade = 1 - (Student's current energy X Assignment difficulty level). The min grade a student may receive is 0% (0) After the grade is calculated the student's energy should be decreased by percentage difficulty. Example if the student has 80% (.8) energy and the assignment is a difficultly level .2 there final energy should be 64% (.64) = .8 - (.8 * .2). The min energy a student may have is 0% (0) Finally the grade calculated should be stored internally with in this class so it can be retrieved later. Then an Assignment Result object should be created with the student's ID, the assignment received as a parameter, and the grade calculated. This newly created Assignment Result object should be returned. :return: The an AssignmentResult outlining this process
"""
sleep(self, hours:float):
"""
This function restore the student's energy as a rate of 10% per hour. So if they sleep for 8 hours there energy will be restored by 80%. If they have 50% (.5) energy and sleep for 8 hours the will wake up with 90% energy = (.5 * (1+.8)). The max energy a s student may have is 100% (1) :param hours: The number of hours a student will sleep for. Example: .2 is equal to 12 minutes or 20% of an hour. :return: None
"""
energy(self):
"""
Returns the current energy of the student. A number between 0 and 1 :return: The energy of the student.
"""
Class Course This class represents a course that a group of students is enrolled in. They will be assigned assignments when enrolled in this course. This object will be used to calculate aggregate student statistics. __init__(self, students: list): """ Constructs a course with the specified list of students :param students: A list containing one or more students
"""
mean_grade(self) -> float:
"""
Returns the numerical value of the class mean (average) grade. :return: The average student grade
"""
max_grade(self) -> float:
"""
Returns the highest grade in the class. The grades used in the calculation come from the student.grade(), it does not care if a grade was earned when the student was in another class. :return: The highest grade in the class
"""
min_grade(self):
"""
Returns the highest grade in the class. The grades used in the calculation come from the student.grade(), it does not care if a grade was earned when the student was in another class. :return: The highest grade in the class
"""
median_grade(self) -> float:
"""
Calculates and returns the median (middle value) of all the student's grades in this course The grades used in the calculation come from the student.grade(), it does not care if a grade was earned when the student was in another class. :return: The median grade
"""
grade_variance(self) -> float:
"""
Calculates and returns the sample variance of all the student's grades in this course The grades used in the calculation come from the student.grade(), it does not care if a grade was earned when the student was in another class. :return: The sample variance of the grades
"""
grade_std_dev(self) -> float:
"""
Calculates and returns the sample standard deviation of all the student's grades in this course. The grades used in the calculation come from the student.grade(), it does not care if a grade was earned when the student was in another class. :return: The sample standard deviation of the grades
"""
assign(self, name: str, difficulty: float) -> None:
"""
This creates an assignment using the parameters specified, then assigns it to all of the students in this course, by calling the assign method on each student. Subsequent invocations to the statistics methods above should reflect the changes made by this method after it is called. In other words if a very difficult assignment is assigned the course mean should be less after. :param name: The name of the assignment :param difficulty: The level of difficulty of the assignment :return: None
"""
can someone help me on this Q with some explanation ? thank you in advance!
In: Computer Science
Illinois State is worried about the rise in crimes in the state. The State Crime Control Unit engaged the services of a researcher to identify the factors that are contributing to rise in crime in the state. The researcher collected data for 50 cities within Illinois to ascertain the cause of rising crime. She collected data on seven variables including overall crime rate per 1 million residents in each of the 50 cities and reported violent crime rate per 100,000 residents.
|
Variable Name |
Description |
|
Crime Rate |
Overall crime rate per 1 million residents |
|
Violent Crime Rate |
Reported violent crime rate per 100,000 residents |
|
Funding |
Annual police funding in $/resident |
|
High School |
% of people 25 years+ with 4 yrs. of high school |
|
School Dropout |
% of 16 to 19 year-olds not in high school and not high school graduates |
|
Undergraduate |
% of 18 to 24 year-olds in college |
|
Graduate |
% of people 25 years+ with at least 4 years of college |
Your job, as assistant to this researcher is to help her identify which variables could form the best possible causes of rising crime in the state of Illinois. Answer the following questions:
List possible dependent variables and reason for your choice here:
List possible independent variables and reason for your choice here:
Identify possible predictors for a dependent variable i.e. list the dependent variable and the corresponding independent/predictor variables. You can add more rows to the table if needed.
|
Name of the Dependent Variable |
Name(s) of Possible Independent/Predictor Variable(s) |
|
|
1 |
||
|
2 |
||
|
3 |
In: Statistics and Probability
The Wentworth Corporation is a mid-sized manufacturing company located in the metropolitan area of Atlanta, Georgia. In business for ten (10) years, it has become one of the area’s largest producers of Widgets. James Henderson and three (3) associates founded the company, which has slowly grown to employ 500 employees, primarily production workers, in its three (3) existing facilities. Henderson is the President and CEO of the corporation, and Mike Johnson is the newly appointed Manager of Human Resources. Wentworth has not employed a full-time HR manager in the past. Henderson is currently in the final stages of securing a major new account. If awarded to Wentworth, it would be a major accomplishment for the firm. However, the additional business would require setting up a new production facility in the state of Wisconsin and hiring 275 additional employees. Mike Johnson has had little experience in creating large staffing initiatives, and both he and Henderson are unsure how to proceed. Henderson and Johnson turn to HR Strategies, Inc., a consulting firm specializing in the functional areas of human resources. As a senior-level consultant in the staffing and recruitment division, you have been asked to head up the team designed to assist Wentworth in the development of a staffing initiative for the new facility. Your Stand-Alone Project responses should be both grammatically and mechanically correct and formatted in the same fashion as the project itself. In addition, you must appropriately cite all resources used in your response and document them in a bibliography using APA style.
Part D: Recruitment Process (40 points)
As the consultant for the Wentworth project, you have now completed your job analysis and know the types of jobs required to staff the Wisconsin manufacturing plant. The next step is to determine whether to use an internal or an external recruitment process to identify and attract job applicants to the new plant. In either case, there will be organizational, administrative, and strategic decisions to be made. As you begin the recruitment phase of the project, you must respond to the following questions. a. Should Wentworth use an external or an internal recruitment initiative? Why? b. Based on your answer to the first question, describe the following. a. Describe the major organizational and administrative decisions to be made including recruitment efforts, requisitions, contact development, budget, and developing a recruitment guide. b. Describe the strategic policy to be followed to implement the initiative; include the concept of targeted strategy, possible targeted sources, and your opinion on the best solution for implementation. c. Describe the communication methods to be used in attracting applicants to these jobs; include the message choice and medium in your discussion.
In: Operations Management
Briefly explain to a high school student who has just finished their first year of biology why antibiotics can have harmful as well as have helpful effects.
In: Biology
As teaching and learning online become a must, every student and lecturer have smartphone. How the School could use such equipment for performance assessment? Read the paper below for reference
In: Economics