# ASHFORD BUS 308 Full Course Statistics for Managers

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Week 1

DQ 1

Data Scales.

A marketing agency is interested in the buying habits of those who shop online versus those who shop in person. In your discussion post, address each of the following and explain your reasoning as to why you picked the specific scale:

a. A database is created and shoppers are classified as online or in-person shoppers. Such classifications represent data of which scale? Explain your reasoning.

b. Online and in-person shoppers are to be compared on their relative incomes. Income data represent data of which scale? Explain your reasoning.

c. If shoppers are also ranked from the most to the least frequent shoppers, those rankings represent data of which scale? Explain your reasoning.

d. Shoppers are asked to complete a customer satisfaction survey. In response to each question on the survey, the shoppers circle one of five answers: strongly agree, agree, neutral, disagree, or strongly disagree. Their responses are data of which scale? Explain your reasoning.

e. What measure(s) of central tendency will be most informative for each of the above data?Justify why each measure is most informative.

f. What would be more critical for the marketing agency to utilize; descriptive or inferential statistics? Why?

DQ 2

Probability.

The manager of a sandwich shop gathers data on what people spend on lunch on a particular day of the week.

The results are \$4.20, \$4.22, \$2.35, \$4.32, \$5.25, \$6.48, \$6.78, \$8.59, \$6.95, \$5.52, \$6.83, \$7.35, \$4.36, \$9.39, \$6.42.

To the degree that this represents the population of all those who eat lunch at sandwich shops, what percentage of customers spend:

a. less than \$4.34?

b. between \$3.50 and \$4.80?

c. less than \$2.35?

Imagine that you are the manager of a sandwich shop. Based on your calculations, what do you think is the best pricing point for your shop? What would you do to increase sales at the sandwich shop?

For additional information on calculating probability refer to the Week One Recommended Resources.

Problem Set Week One.

Assignment Instructions:

Complete the problems below and submit your work in one Word document. Be sure to show all of your work and clearly label all calculations. Calculations completed in Excel must be copied and pasted into a single Word document. No Excel documents will be graded.

For additional assistance with these calculations reference the Recommended Materials for Week One.

TIP: For help copying and pasting information from Excel to Word go to http://office.microsoft.com/en-us/word-help/copy-excel-data-or-charts-to-word-HP010198874.aspx or watch the Excel Tips – Tip#48: Copy from Excel to Word video found in Week One Recommended Resources.

Problem 1

The performances of a group of interns are evaluated by their supervisors at the end of their internships.

Their scores are: 55, 47, 62, 27, 50, 49, 66, 53, 50, 44, 63, 59.

Complete the calculations below using this data. Show all of your work and clearly label each of your calculations.

a. the mean

b. the median

c. the range

d. the standard deviation

e. the variance

Problem 2

The Anxiety General Stress Test (ANGST) has been designed to gauge the level of psychological stress management trainees experience when they are under pressure.

For a random sample of trainees the scores are as follows: 47, 49, 53, 53, 54, 58, 61, 64, 75, 81.

Complete the calculations below using this data. Show all of your work and clearly label each of your calculations.

a. What is the z score equivalent of ?

b. What is the probability that someone selected at random will score 81 or lower?

c. What percentage of all trainees will score between 60 and 75?

Copy and paste your calculations for the three problems from Excel to Word and submit one Word document with your clearly labeled calculations and interpretations.

ASHFORD BUS 308 Week 1 Quiz

Week 2

DQ 1

t-Tests.

Imagine a shift manager at a manufacturing plant is gathering data on the number of units workers assemble during two different shifts over 10 different days. If the number of units assembled by each shift varies greatly from day to day, what impact will that have on the likelihood of a significant difference between the two shifts? Explain and support your response.

DQ 2

ANOVA Testing.

The manager of an agency providing temporary employees to city offices is analyzing the number of days temporary hires typically work in various types of industries.

The data are as follows:

Legal clerical: 2, 1, 4, 4, 2, 5, 6

Accounting firms: 3, 6, 4, 5, 5, 7, 8

Insurance: 5, 4, 7, 9, 9, 8, 11

Using the data above, answer the following questions:

a. Are there significant differences in the length of time temporary employees work in the different industries?

b. How much of the differences can be explained by the industry?

c. Which groups are significantly different from others?

d. Why would a manager be focused on measuring the number of days that a temporary works each week?

ASHFORD BUS 308 Week 2 Quiz

Problem Set Week Two.

Assignment Instructions:

Complete the problems below and submit your work in one Word document. Be sure to show all of your work and clearly label all calculations. Calculations completed in Excel must be copied and pasted into a single Word document. No Excel documents will be graded.

TIP: For help copying and pasting information from Excel to Word go to http://office.microsoft.com/en-us/word-help/copy-excel-data-or-charts-to-word-HP010198874.aspx or watch the Excel Tips – Tip#48: Copy from Excel to Word found in Week One Recommended Resources.

Problem One

Suppose that an automotive parts and accessories chain is experimenting with a new sales promotion. Two similar stores are selected for the experiment. For Store 1, nothing changes. This store constitutes the control group. For Store 2, the treatment group, the promotion is implemented.

Sales in hundreds of dollars over a five-day period are as follows:

Control: 6, 6, 7, 10, 12, 9, 6, 5, 5, 7

Treatment: 2, 5, 2, 4, 7, 1, 2, 3, 4, 5