# Group Assignment 1

Managerial Statistics (ENMGT 572) Group Assignment You are permitted to use SPSS to solve the following problems unless otherwise stated. Problem 1: Refer to the data file Executive salary. xls. This files shows annual salary of CEOs for various companies and industries. The random variable of interest for this exercise is Sum97. This is the CEO’s annual salary plus bonuses for the year 1997 (referred to as salary here-in).
The purpose of this exercise is to determine if there is a significant difference between mean salaries of executives for various industries. There are 8 industries in this data file. Answer the following questions, assume = . 05 level for all tests. a. Briefly explain (in one or two sentences) what type of test approach you would use to determine if there is a difference in the mean salaries among all industries. Also, how would you set up the null and alternate hypothesis? b. Conduct a test to determine if the mean salaries among all industries are equivalent.
Also, if there is a difference briefly explain or identify the variables or categories (treatment) that contribute to this difference (You may use Tukey’s Procedure for answering this part) c. Conduct a test to determine if there exist a difference in the mean executive salary for the following groups of industries: I. Industrial and Basic Materials II. Industrial and Technology III. Basic Materials and Technology Before conducting the test above, perform a test on equivalent population variances for each pair of company type.

In a brief paragraph, comment of the conclusions of the test results. d. Determine the upper and lower range salary values for each industry at 90% and 95% confidence intervals e. Perform a test of normality (Chi-Square evaluation) on the data for each of the three industries in part c and comment on your findings. First produce a histogram with about 5 categories for this test and perform the test using a Chi-Squared approach. Problem 2: Refer to file “Heating_Bill. xls,” which provides heating bills on a sample of residential homes for the month of February.
The file categorizes the data by the type of home (single level or two story) and heating source (natural gas, electric and oil). Conduct a test at the =. 05 level to answer the following questions: a. Is there evidence to suggest that the type of heating source used impacts the monthly heating bill? b. Is there evidence to suggest that the type of home (single or two story) impacts the monthly heating bill? c. Is there evidence to suggest that the interaction between these two categories (type of home or heating source) impacts the monthly heating bill?

Don't use plagiarized sources. Get Your Custom Essay on
Group Assignment 1
Just from \$13/Page

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

## Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

### Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Order your essay today and save 15% with the discount code GINGER