# OMIS 2010 Study Guide - Final Guide: Mean Absolute Difference, Block Design, Load Management

by OC104672

School

York UniversityDepartment

Operations Management and Information SystemCourse Code

OMIS 2010Professor

AlexanderStudy Guide

FinalThis

**preview**shows pages 1-3. to view the full**16 pages of the document.**SCHULICH SCHOOL OF BUSINESS

YORK UNIVERSITY

SESSION: Practice Final Exam NAME:

COURSE NO: MGMT 10 5 0 I.D. # :

COURSE TITLE: Statistics for Management SECTION:

PROFESSORS:

NUMBER OF PAGES: 13 pages (NOT including cover)

LENGTH OF EXAMINATION: 150 minutes

EXAMINATION AIDS ALLOWED: Calculator; Formula and Tables Book

INSTRUCTIONS:

1. Please place your I.D. card on your desk.

2. You are not allowed to leave the examination room until one hour after the start of the

exam and you must sign the sign-in sheet before leaving.

3. Your examination paper must be handed in before you leave. When you are finished

please leave the exam room quietly.

4. Cheating on an examination will result in an “F” grade in the course concerned and

possible suspension from the University.

5. All notes, briefcases, and books must be deposited at the front of the room.

6. You are not allowed to use your own paper for rough work. You may only use the space

provided or the back of the pages for rough work.

7. Answer the Multiple Choice and True/False Questions on the Scantron Sheet supplied.

Be sure to put your name and student number on the bubble sheet. In Parts I and IV,

place your answers in the answer boxes, where supplied.

8. Count the pages to be certain that there are no pages missing.

9. Do not remove the staple or any pages from the exam.

10. Please show all your work.

11. If alpha is not given in the question use 0.05

12. Do not begin this examination until you are instructed to do so.

13. Do not write in the mark summary table below.

Part I – Problem Recognition 24 marks

Part II – True/False 8 marks

Part III – Multiple Choice Questions 10 marks

Part IV – Problems Question 1 8 marks

Question 2 22 marks

Question 3 20 marks

Question 4 8 marks

Sub-total 58 marks

TOTAL 100 marks

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

MGMT1050 Practice Final Examination

PART I - PROBLEM RECOGNITION (24 MARKS, 2 MARKS EACH)

Instructions: For each of the scenarios below, write the null and alternative hypotheses and

indicate the most appropriate statistical test. You are not required to conduct the test, just

choose the most suitable test from the following options: z-test; t-test; χ2-test; F-test,

ANOVA.

Notes:

(1) Be specific in your answers: for example, specify the type of ANOVA required (one-way,

randomized block, or two-way), or whether you would use the t-test for equal variances or not.

(2) When writing hypotheses for two population tests, use meaningful indexing. For example, if the

question asks to compare Canada and the US, write µc-µu as opposed to µ1-µ2.

(3) Write all relevant hypotheses for each of the questions.

1. Do “captive stores” have better or worse pricing? In

order to test this question, a researcher selected 20

Sony products and collected the prices for these items

at three stores: the “Sony Style” store, “The Source”

and a local independent electronics retailer.

Hypotheses (H0 and HA):

HO: Blocking is not necessary

HA: Blocking is not necessary

HO: µ1=µ2=µ3

HA: At least one mean is different

Test:

Block design ANOVA

2. Clothes lines, where people hang their clothes outside

on lines to dry, are making a come-back as people

strive to reduce the amount of energy used. One

green consumer who had both types of clothes lines

(the pulley type and the collapsible clothes line tree

style) decided to see if there is a deference in drying

times by putting half of the laundry on each type of

clothes line for 15 weeks.

Hypotheses (H0 and HA):

HO: µD=0

HA: µD≠0

Test:

t-test of μD

3. An accounting student, trying to determine her optimal

career path, want to see how the incomes of

accountants varied based on which designation they

held (CA, CMA, CGA) and whether they worked in

industry or private practice.

Hypotheses (H0 and HA):

Interaction:

HO: There is not interaction

HA: There is interaction

Designations:

HO: µ1=µ2=µ3

HA: At least one mean is different

Type of Practice:

HO: µ1=µ2

HA: µ1≠µ2

Test:

Two Way ANOVA

4. How much has the recent decline in the stock market

affected investor’s retirement portfolios? A study three

years ago found that for families with the oldest

working spouse between 50 and 60 years old, the

average portfolio value was $325,000. A survey of

200 families in the same age group done last month

found the average to be $275,000 with a standard

deviation of $65,000.

Hypotheses (H0 and HA):

HO: µ≥325,000

HA: µ<325,000

Test:

t-test of μ

DO NOT REMOVE THE STAPLE OR ANY PAGES Page 2 of 16

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

MGMT1050 Practice Final Examination

5. A quality control inspector wants to see is a new

supplier is providing castings within the requirement of

the standard deviation of the width being less than

0.85mm. A sample of 60 castings found the variance

to be 0.6561mm2.

Hypotheses (H0 and HA):

HO: µ≥325,000

HA: µ<325,000

Test:

χ2 test of σ2

6. There has been controversy about the effectiveness of

the national Do Not Call (DNC) List. In fact, many

people are complaining that they are getting more calls

now that they have registered for the DNC List. A

researcher obtained clearance from 200 randomly

selected people on the DNC List to get access to their

telephone records to compare how many call they

received in September, prior to the implementation of

the DNC List, and January, after registration for the

DNC List.

Hypotheses (H0 and HA):

HO: µ1-µ2=0

HA: µ1-µ2≠0

Test:

t-test of μ1-μ2

7. Does choice of business school affect the choice of

major or concentration? To test this, a researcher took

random samples of 100 graduating students from (1)

Schulich, (2) Ivey, and (3) Laurier and categorized

then by the following majors: (A) Accounting, (B)

Marketing, (C) Finance, (D) International, (E) OB/HR

and (F) Other.

Hypotheses (H0 and HA):

HO: Choice of B-School is

independent of major

HA: Choice of B-School is not

independent of major

Test:

χ2, test of a contingency table

8. Suppose that the study in question 7 only compared

Schulich and Ivey.

Hypotheses (H0 and HA):

HO: Choice of B-School is

independent of major

HA: Choice of B-School is not

independent of major

Test:

χ2, test of a contingency table

9. Suppose that the study in question 7 also looked at

the starting salaries offered to the graduating

students.

Hypotheses (H0 and HA):

Interaction:

HO: There is not interaction

HA: There is interaction

B-School:

HO: µ1=µ2=µ3

HA: At least one mean is different

Major:

HO: µ1=µ2=µ3=µ4=µ5=µ6

HA: At least one mean is different

Test:

Two Way ANOVA

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