A) Two arthroscopic surgeries were compared among patients suffering from osteoarthritis who had at least moderate knee pain. The lavage type has the joint flushed with fluid and no instrument is used to remove tissue; the debridement type has the joint flushed with fluid and an instrument is used to remove tissue. Knee pain scores, ranging from 0 to 100 with higher scores indicating severe pain, were obtained for patients randomly assigned to the two groups after the surgery and the results are given below:

------------Sameple Size--------Sample Mean-------Sample Standard Deviation

Lavage 11 59 24

Debridment 13 49 23

Determine a 95% confidence interval for the difference between the mean knee pain score for the lavage group and that for the debridement group

B) A test of abstract reasoning is given to a random sample of 10 students before and after completing a formal logic course. The results are shown below.

Before----------After

71 71

81 86

85 82

67 75

92 95

71 66

61 67

78 81

64 71

80 88

Determine a 95% confidence interval for the difference between the mean score after completing the course and the mean score before completing the course

C) The quality control officer collects a random sample of 100 yardsticks from the day's production run. The sample mean is 36 inches. The population standard deviation for that day’s production is σ =1 inches.

1)Find a 99% confidence interval for the mean length of all yardsticks made that day

2)The margin of error associated with the 99% confidence interval for the mean length of all yardsticks made that day is

3)You decide that margin of error in previous question is too large, and you want it to be at most 0.1 inches, what is the minimum sample size in order to obtain this margin of error with a confidence level of 99%?

Assume that if the product requested is not in stock, it needs to be manufactured before the order handling can continue. In this way, an order can never be rejected. To manufacture a product, the required raw materials have to be ordered. Two preferred suppliers provide dierent types of raw material. Depending on the prod- uct to be manufactured, raw materials may be ordered from either Supplier 1 or Supplier 2, or from both. Once the raw materials are available, the product can be manufactured and the order can be conrmed. On the other hand, if the product is in stock, it is retrieved from the warehouse before conrming the order. Then the process continues normally. After conrming the order, the shipment address is received and the requested product is shipped while the invoice is emitted and the payment is received. Afterwards, the order is archived and the process completes. 2 With respect to the above process, use the following report format and provide necessary discussion under each section: 1. Descriptions of System - Describe the system - (If any) Explain any problem(s) in the system (e.g. causes of the problem and its (potential) eects 2. Simulation Objective(s) - State the objective(s) of carrying out your simulation project 3. Experimental Factors & Responses - Discuss the potential experimental factors of your simulation study. - Discuss the potential responses and explain how they should be presented. 4. Model Contents & Level of Details - Show which of systems components will be included/excluded in your simu- lation model and explain why they should be included/excluded. - Describe the appropriate level of details for the included components. 5. Models Process Map - Diagrammatically represent your conceptual model in a form of a process map - Make sure that the constructed process map is representative to the model contents and level of details. 6. Assumptions & Simplications - State all assumptions are made to abstract the system in the conceptual model. - Describe any simplications are made during the abstraction process.

Hello Everyone,

Can anyone tell me why my program will not run? I am trying to work on abstract base classes... not sure what is going on.

import math

from abc import ABC

from abc import abstractmethod

#TODO: convert this to an ABC

class Shape(ABC):

def __init__(self):

self.name = ""

def display(self):

print("{} - {:.2f}".format(self.name, self.get_area()))

#TODO: Add an abstractmethod here called get_area

@abstractmethod

def get_area(self):

if self.name == "Circle":

get_area()= 3.14 * radius * radius

else:

get_area() = self.length * self.width

#TODO: Create a Circle class here that derives from Shape

class Circle(Shape):

def __init__(self):

super().__init__()

self.name = "Circle"

self.radius = 0.0

get_area()

#TODO: Create a Rectangle class here that derives from Shape

class Rectangle(Shape):

def __init__(self):

super().__init__()

self.name = "Rectangle"

self.length = 0.0

self.width = 0.0

get_area()

def main():

#TODO: Declare your list of shapes here

s = Shape()

c = Circle()

r = Rectangle()

radius = []

length = []

width = []

command = ""

while command != "q":

command = input("Please enter 'c' for circle, 'r' for rectangle or 'q' to quit: ")

if command == "c":

radius = float(input("Enter the radius: "))

#TODO: Declare your Circle here, set its radius, and

# add it to the list

self.name = "Circle"

radius.apphend

return radius

elif command == "r":

length = float(input("Enter the length: "))

width = float(input("Enter the width: "))

#TODO: Declare your Rectangle here, set its length

# and width, and add it to the list

self.name = "Rectangle"

return length, width

length.apphend

width.apphend

# Done entering shapes, now lets print them all out:

s.display()

#TODO: Loop through each shape in the list, and call its display function

for i in Shape():

s.display()

if __name__ == "__main__":

main()

1. The concept of technology managing value-exchange transactions and allowing access by businesses to information throughout the exchange is called _______________________________.

   	A.	Machine Learning
   	B.	Mesh Applications
   	C.	Conversational Systems
   	D.	Blockchain

2 points   

QUESTION 4

1. Supply Chain Information Systems would typically contain modules for the following, EXCEPT:

   	A.	Lead Generation and Tracking
   	B.	Inbound/Outbound Logistics
   	C.	Inventory Management
   	D.	Order Management

Which of the following statements is NOT true regarding the relationship between Artificial Intelligence and jobs?

1. Which of the following statements is NOT true regarding Business Intelligence Information Systems?

   	A.	Business Intelligence systems are only used to support the development of marketing programs
   	B.	Business Intelligence systems analyze past performance and make predictions about future behavior
   	C.	Business Intelligence systems incorporate all five standard information system components
   	D.	Data Warehouses are generally a key element of Business Intelligence systems

2 points   

QUESTION 11

1. Which of the following statements is NOT true regarding market-basket analysis?

   	A.	It is a data mining technique for determining sales patterns, and helps determine cross-selling opportunities
   	B.	Market-basket analysis focuses on the probability that two or more items will be purchased together
   	C.	Support is the conditional probability estimate of whether one item will be purchased given that the customer purchased a second item
   	D.	Lift shows how much the base probability for purchasing an item increases or decreases when other products are purchased.

Your firm maintains a citation index of biomedical journal articles used by a variety of medical research institutes and pharmaceutical firms. Each article is identified by a unique "DOI number"; in addition to this number, you want the database to store each article's title, abstract, date of publication, journal volume number, journal issue number, and journal pages. Each article is authored by one or more researchers. For each researcher, your database should store a family name, given name, date of birth, and current employer. The database should remember which researchers authored each article, and the order they appear in the article writing credits.

Each article appears in a single journal, and each journal is identified by a unique "ISSN" number. The database should be able to identify which journal each article appeared in. Furthermore, for each journal, the database should remember its name and the name of the organization that publishes it. Sometimes journals change names, and one journal "continues' another journal. For example, the ORSA Journal on Biomedical Computation might become the INFORMS Journal on Biomedical Computation when its publishing organization merges with another organization. The name change makes it a different journal but the database should be able to remember which journal (if any) "continues" any given journal.

Finally, articles usually contain multiple citations to other articles. For example, an article about clinical treatment of a particular disease might contain citations to dozens of prior research articles about that disease. This information can be very useful to researcher, so the database should be able to store the full pattern of citations between articles. Note that an article not only usually cites many other articles but may also be cited by many other articles.

1. Create a high-level ERD which shows only the cardinality and modality between the main entities.
2. Write out the tables including the primary keys and the foreign keys.(see details below)
3. Complete a full ERD with all tables, cardinalities and modalities.

The Company - Traditions Ltd

Recent Events

In the past the Store has operated profitably. However, the most recent financial statements revealed a small loss for the previous trading period. This came as quite a shock to the owners and is causing great concern.

Prior to this news, and in a move which seems to have been totally unrelated to it, the family members decided to appoint a Managing Director in order to take some of the workload from their own shoulders. They appointed Vijay as the Store's first Managing Director and when he takes up his appointment he will be the first 'non-family' member to be employed in a senior managerial role. He is well qualified for the job, having gained valuable retail experience with Sparks and Mention plc, a leading department store chain with a first class management training programme and an excellent growth and profits record. His first post with Sparks and Mention plc was as a graduate trainee and he progressed to store manager of one of the company's stores in the affluent South East of England.

As a result of the reported loss for the previous trading period, the family members called a meeting of the Store's employees to discuss the situation. This type of meeting was unprecedented in the history of the Store. Prior to the meeting, a suggestion box was set up and attendees were asked to put forward suggestions for improving the profitability of the Store.

One suggestion for improving the profitability of the Store was the closure of the Toy Department, another suggestion was the closure of the Restaurant and a third suggestion was an across the board price reduction of 5% in order to stimulate demand. In each case the source of the suggestion was not identified.

Unfortunately, when the family members asked for information to assist in evaluating these suggestions, this was hampered by the lack of management information produced within the company. Apparently, the recording systems were geared to maintaining records for government regulatory bodies, such as Customs and Excise and the Inland Revenue, and to assist the company secretary in the production of the year-end financial statements.

Since Samantha is studying for an accounting degree, she was asked to tackle the job of seeking out information which might be helpful. The information she produced is set out below. It identifies revenues and costs incurred during the previous trading period.

The family members were so impressed with the information she produced that they asked her to consider taking on the additional role of management accountant in the company.

Samantha has looked into the behaviour of these costs at different sales levels. Purchases of goods for resale in all departments varied proportionally with the level of sales. Additionally, due to the staffing policy of the company (see note on staffing policy below), so did the wages of non-management staff. Departmental expenses (for instance, wrapping paper for goods purchased, cleaning of staff uniforms) were also considered to vary with the level of sales, and there seemed to be a direct correlation between sales promotion costs in the departments and the increase in sales. Other costs totaling $412,000 (not included in the above schedule) were considered not to change with sales levels and some of these costs could not be directly related to individual departments.

Note on Staffing Policy

The company staffs all the Departments by using a core of full time staff to cover a minimum demand level and a flexible workforce of part time staff to work as and when required, with no guaranteed minimum or maximum number of hours for part-time staff.

Required:

a)         On the assumption that the costs for this trading period will not change significantly from those of the previous period, prepare marginal costing statements to show contributions for each department and contribution and profit for the Store overall on the basis of:

      i)          all departments remaining in operation;

      ii)         the closure of the Restaurant Department

b)         Discuss briefly the financial and non-financial consequences of closing the Restaurant Department.

c)         Identify the problems which Samantha would need to address in her new role as                          Management Accountant of Traditions Limited.

d)         How would you, as Samantha, approach the setting up of a budgetary planning and control system for the Store and what behavioural problems do you think you might encounter.

What is the future value of a five-year ordinary annuity of $1,000 per year if the interest rate is 1.28%? Hint: solve for year 5.

What is the value in year 4 of a $710 cash flow made in year 6 if interest rates are 9 percent? (Do not round intermediate calculations. Round your answer to 2 decimal places.)