Project #3 is due on Monday, March 21.   · Project #3 will be scored on a 50-point scale.   · You are encouraged, but not required, to work with one or two partners on Project #3.

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Project #3 is due on Monday, March 21.

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·        Project #3 will be scored on a 50-point scale.

·        You are encouraged, but not required, to work with one or two partners on Project #3.  If you do choose to work as a group of 2 or 3, then only one paper need be submitted and all members of the group will receive the same grade.

·        Please record all answers on the Yellow Sheet which accompanies this assignment; 4-place accuracy is sufficient for all answers. For written answers, assume your reader is intelligent, but not a statistician.

MGSC2301                              PROJECT #3 (Conf Int/Hypo Test)                Page 1

This project again utilizes the data set for the Bank and Trust Company (B&T); the random sample of 222 employees and data recorded for several variables:

·     Annual salary earned by the employee;       

·     The age of the employee;

·     The years of experience in the banking industry held by the employee prior to

        joining B&T;

·     The education level of the employee;

·     The extent to which the employee uses a computer;

·     The grade classification within B&T held by the employee;

·     The years of experience at B&T;

·     The gender of the employee;

·     The citizenship of the employee; and

·     A location adjustor for salary using a 1-5 scale.

Assume that you still work for Ms. Deanna V. Ashun (aka “Dee”) and that the lawsuit alleging gender bias has been resolved in favor of B&T.  But more work remains, and Ms. Ashun has asked you to complete several tabulations and calculations, excluding the CEO from all calculations.

Note: Assume normality!!!

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

#1:  (a)      What is the point estimate for the average annual salary paid to B&T

                 employees in each of the six grades?

                 Please round your answers to the nearest whole dollar.

                 (12 points)

       (b)     For the Vice Presidents (GRADE 6) only, find the 95% Confidence Interval

                 for the average annual salary.

                 (2 points)

       (c)      Ms. Ashun’s boss, Mr. Samuel Pellsize, is an intelligent man, but has

                 limited statistical training.  In a maximum of two sentences, provide a

                 managerial interpretation of your numeric result from part (1b); this

                 interpretation will be read by Mr. Pellsize.

                 (2 points)

       (d)     For part (b), did you use the Finite Population Correction Factor

                 Why or why not? (4 points)

MGSC2301                            PROJECT #3(Conf Int/Hypo Test)                  Page 2

Mr. Pellsize is glad that the gender bias lawsuit has been resolved, but does still wonder about B&T’s promotion practices.  For example, he is aware that in the sample being used, 14 out of 15 vice presidents are male.   Since many of the vice presidents are promoted from within, this leads to a concern that B&T might not have an adequate pool of female senior officers (GRADE 5).  So he wonders if B&T exhibits some form of gender bias in terms of the promotion of branch managers/junior officers (GRADE 4) to senior officers (GRADE 5). 

Note:  this is often referred to a glass ceiling for women.

Mr. Pellsize and Ms. Ashun decide to be pro-active and start an investigation.

#2:  Ms. Ashun quickly asks you for the following calculations:

(a)   What proportion of the branch managers/junior officers (GRADE 4) is female?

       (2 points)

(b)   What proportion of the senior officers (GRADE 5) is female?

       (2 points)

(c)   Find a 99% confidence interval for the proportion of females in GRADE 4.

       (2 points)

(d)   Find a 95% confidence interval for the proportion of females in GRADE 5.

       (2 points)

(e)        Assuming your reader is Mr. Pellsize, explain the numerical values found in part

       (2c &          2d) above – using a maximum of two sentences.

       (2 points)

Still somewhat concerned, Ms. Ashun asks you to continue to focus on the B&T employees in GRADES 4 and 5.  She does some research – investigating other North American banks the size of B&T.  She finds that on average, branch managers in other banks get paid an average of 80,000/year and that senior officers get paid an average of $90,000/year.  She wonders if B&T pays comparable salaries.

#3:  (a)      Find the average salary for the females in GRADE 4.

                 Please round your answer to the nearest whole dollar.

                 (2 points)

       (b)     If:      mFemales4 = average salary for all B&T females in GRADE 4

       (c)      Find the average salary for the males in GRADE 4.

                 Please round your answer to the nearest whole dollar.

                 (2 points)

MGSC2301                          PROJECT #3 (Conf Int/Hypo Test)                    Page 4

       (e)      Find the average salary for the females in GRADE 5.

                 Please round your answer to the nearest whole dollar.

                 (2 points)

       (f)      If:      mFemales5 = average salary for all B&T females in GRADE 5

In the context of the problem specify your final conclusion in words.

                 (3 points)

       (g)     Find the average salary for the males in GRADE 5.

Please round your answer to the nearest whole dollar.

                 (2 points)

(h)     If:      mMales5 = average salary for all B&T males in GRADE 5

In the context of the problem specify your final conclusion in words.

                 (3 points)



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