Group Assignment 1

Managerial Statistics (ENMGT 572) Group Assignment You be permitted to use SPSS to solve the interest problems unless otherwise stated. Problem 1 Refer to the data file executive director salary. xls. This files shows annual salary of CEOs for various companies and industries. The random variable of interest for this make out is Sum97. This is the CEOs annual salary plus bonuses for the year 1997 (referred to as salary here-in).The purpose of this exercise is to determine if on that point is a crucial difference between mean salaries of executives for various industries. There are 8 industries in this data file. Answer the followers questions, assume = . 05 level for altogether footraces. a. Briefly explain (in one or two sentences) what persona of rill 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 guessing? b. Conduct a test to determine if the mean salaries among all industries are equivalent.Also, if there is a difference briefly explain or tell the variables or categories (treatment) that contribute to this difference (You may use Tukeys force for answering this part) c. Conduct a test to determine if there dwell a difference in the mean executive salary for the pastime groups of industries I. Industrial and Basic Materials II. Industrial and Technology III. Basic Materials and Technology ahead conducting the test above, perform a test on equivalent nation variances for distributively pair of company grammatical case.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, galvanic 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 use 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?