Golf and Chi-Square Tests

Discussion

Introduction

This discussion provides a simulated exercise using two of the most popular Chi-Square statistical tests. You are strongly encouraged to complete the textbook reading and start the MyStatLab Homework assignment before beginning this discussion. You need to be familiar with the Chi-Square distribution, its interpretation, and how results are typically calculated and reported together.

In this discussion, you are required to calculate and interpret your findings.

Review the information in each section and participate in the discussion.

Golf Rounds Scenario

As the Director of Golf for the Links Group, you are trying to determine if there is a significant difference in the number of rounds of golf played based on the day of the week. So far, you've gathered the following sample information for 520 rounds.

Now, you need to use the sample to answer these questions. For each question, the null hypothesis is that the cell categories are equal, and the significance level is .05.

• Is there a significant difference in the rounds of golf played during the week? Why is your choice appropriate?
• What is the critical value and number of degrees of freedom for the Chi-Square statistic?
• What is your decision regarding the null hypothesis? Why is your decision appropriate?

Golf Ball Quality Scenario

In addition to determining if there is a significant difference in the number of rounds of golf played based on the day of the week, you also have to determine which brand of "range balls" to buy for use at the driving range. You are looking for the most durable ball that will hold up for an extended period. You obtained samples of 100 golf balls from four different manufacturers, and your teaching professionals tested them for durability. The table shows the numbers of unacceptable and acceptable golf balls by manufacturer.

At the .05 significance level, is there a difference in the durability of the range balls? Why is your decision appropriate?

Additional Instructions

Use Excel or Statdisk to answer the questions posed in both scenarios. Remember, the focus of this discussion is understanding and interpreting two different Chi-Square tests.

To get around the problem presented in question 2, the internal standard technique is used. An internal standard is a volatile compound that does not interfere with the GC analysis.

• 10.0 mg of internal standard compound (Std) added to 50.0 mg of the mixture of A, B, and C (problem 2) to give a mixture with a total mass of 60.0 mg.

• The sample is analyzed by GC.

• Relative Peak Areas: Std (1.00), A (0.75), B (3.00). Remember C does not elute.

• Based off of the 10.0 mg of internal standard added to the sample, what are the weight percentages of A and B in the original sample?

a): Suppose we have developed the following rules and facts for our system.
Rule 1: If X is an animal then X is living spices
Rule 2: If X is living spices then X is a life form
Rule 3: If X is a life form then X is mortal
Fact: Dog is an animal.
Goal: Is Dog a mortal?

Problem: Using forward chaining, try to conclude that Dog is mortal.

b)The following is the rule set of a simple weather forecast expert system:

Rule 1. IF cyclone THEN clouds
Rule 2. IF anticyclone THEN clear sky
Rule 3. IF pressure is low THEN cyclone
Rule 4. IF pressure is high THEN anticyclone
Rule 5. IF arrow is down THEN pressure is low
Rule 6. IF arrow is up THEN pressure is high

Problem: Use backward chaining to reason about the weather if the working
memory contains the fact: clouds. Show your answer in a table naming the
rules matching the current working memory (conflict set), which rule you
apply, and how the working memory contents changes on the next step after a
rule has fired:

hnt: artificial intelligence question

Complete the t-accounts below using the transactions listed (1.5 pts). 4. Calculate the ending balance of each account (.5 pts). • styx. issues a $1,000 bond in order to raise cash • styx. issues $5,000 in stocks to raise cash • styx. spends $2,400 of its cash to purchase a new tuning machine Debits - + Credits Debits + - Credits Debits Credits 5. Complete the Accounting Equation below (.5 pts). 6. Circle the mathematical functions that complete the accounting equation (.5 pts). Assets: ____________ + / - / = Liabilities: ________________ + / - / = Owners Equity: _____________

The $5,000 stock sale from the first page was split into 500 shares. Calculate the price of a share of (a company called Styx). given the following information.

Please show your work.

Year 1 Profits: $3,500 Year 2 Profits: $4,250 Discount Rate: 3.25%

A. Share Price: ________________

B) What is the new share price if you decide that Year 2 profits will be $5,500 and you change your discount rate for all years to 5%?

Share Price: ________________

c) If a company called Styx  is listed on the Dow Jones Industrial Average, and the Dos divisor is .1474, by how much will the Dow change if the price of a share of Styx. increases by $3.00? ________________

Give an example of how you learn and describe in details by using Kolb’s Learning Cycle. Based on that, illustrate how you lead people to learn with reference to Kolb’s Learning Cycle. (500words)

Critically evaluate the engineering, procurement and construction (EPC) contract and the engineering, procurement and construction management (EPCM) contract as used in the civil engineering industry. Critically evaluate how each contracting strategy is used in the real world

How does food processing reduce food waste? Explain.

Allocating Selling and Administrative Expenses using Activity-Based Costing

Shrute Inc. manufactures office copiers, which are sold to retailers. The price and cost of goods sold for each copier are as follows:

In addition, the company incurs selling and administrative expenses of $279,440. The company wishes to assign these costs to its three major retail customers, The Warehouse, Kosmo Co., and Supply Universe. These expenses are related to its three major nonmanufacturing activities: customer service, sales order processing, and advertising support. The advertising support is in the form of advertisements that are placed by Shrute Inc. to support the retailer's sale of Shrute copiers to consumers. The budgeted activity costs and activity bases associated with these activities are:

Activity-base usage and unit volume information for the three customers is as follows:

Required:

1. Determine the activity rates for each of the three nonmanufacturing activities. Round to the nearest whole dollar.

2. Determine the activity costs allocated to the three customers, using the activity rates in (1).

3. Construct customer profitability reports for the three customers, dated for the year ended December 31, 2016, using the activity costs in (2). The reports should disclose the gross profit and income from operations associated with each customer. Enter all amounts as positive numbers, except for a negative income from operations.

As discussed in the previous question, the second stage of the propulsion system is used to boost the spacecraft from Martian orbit into an interplanetary trajectory and return to Earth.

Knowing that the thrust generated by the second stage is 2620 N and the rocket exhaust velocity is 430 m/s; calculate the minimum amount of propellant needed to have a chance of returning to Earth. Assume that the thruster must be turned on for 2 minutes in order to reach the proper velocity.

Give your answer in kg.

Thank you for your time!

Design a class named Employee. The class should keep the following information in fields: • Employee name • Employee number in the format XXX–L, where each X is a digit within the range 0–9, and the L is a letter within the range A–M. • Hire date Write one or more constructors and the appropriate accessor and mutator methods for the class. Next, write a class named ProductionWorker that inherits from the Employee class. The ProductionWorker class should have fields to hold the following information: Shift (an integer) Hourly pay rate (a double) The workday is divided into two shifts: day and night. The shift field will be an integer value representing the shift that the employee works. The day shift is shift 1, and the night shift is shift 2. Write one or more constructors and the appropriate accessor and mutator methods for the class. Demonstrate the classes by writing a program that uses a ProductionWorker object. In a particular factory, a shift supervisor is a salaried employee who supervises a shift. In addition to a salary, the shift supervisor earns a yearly bonus when his or her shift meets production goals. Design a ShiftSupervisor class that inherits from the Employee class. The ShiftSupervisor class should have a field that holds the annual salary, and a field that holds the annual production bonus that a shift supervisor has earned. Write one or more constructors and the appropriate accessor and mutator methods for the class. In a particular factory, a team leader is an hourly paid production worker who leads a small team. In addition to hourly pay, team leaders earn a fixed monthly bonus. Team leaders are required to attend a minimum number of hours of training per year. Design a TeamLeader class that inherits from the ProductionWorker class. The TeamLeader class should have fields for the monthly bonus amount, the required number of training hours, and the number of training hours that the team leader has attended. Write one or more constructors and the appropriate accessor and mutator methods for the class. Demonstrate the classes by writing a program that uses a TeamLeader object and a ShiftSupervisor object, as well as an Employee object. Be sure that all methods defined are called.

Explain what you understand from 'Ohm's law'. In about 50 words, explain practical consequences of Ohm's law, with examples from real life, as needed.

Determine the pH of a solution when 22.7 mL of 0.028 M HNO3 is mixed with 19.6 mL of

A) 0.0120 M NaOH.
B) distilled water
C) 0.0080 M HCl
D) 0.144 M KOH

Case Scenario: A teenage baseball player gets hit in the head with a fast- hard ball. Paramedics rush him to the hospital. Upon arrival to the ED, you find he is disoriented, he has sporadic respiratory changes, and his pupils are dilated but respond to light. He can tell you his name but not what has happened. During the exam, he vacillates between being somnolent and hyper aroused. The doctor tells parents of the boy that their child has a focal brain injury. He has no prior health conditions.

1. Question: During an observation of their son, the doctor tells the parents that the staff will be evaluating to see if there is a secondary brain injury. Give signs and symptoms of a secondary brain injury and explain why these symptoms occur. You will need to defend your answer using specific facts, data.