# BUS-352 Module 2 Chapter 2 Problem Set - Problems 2.11, 2.15, 2.20, 2.24, 2.39, 2.43, 2.47, and 2.49

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BUS-352 Module 2 Chapter 2 Problem Set - Problems 2.11, 2.15, 2.20, 2.24, 2.39, 2.43, 2.47, and 2.49

Business Statistics - Analysis Using Graphs and Descriptive Statistics

Grand Canyon University

Text book - Business Statistics: A First Course (6th Edition)

Complete problems 2.11, 2.15, 2.20, 2.24, 2.39, 2.43, 2.47, and 2.49 in the textbook.

Submit one Excel file. Put each problem result on a separate sheet in your file.

Problem

Each day at a large hospital, several hundred laboratory tests are performed.

The rate at which these tests are done improperly (and therefore need to be redone) seems steady, at about 4%.

In an effort to get to the root cause of these nonconformance, tests that need to be redone, the director of the lab decided to keep records over a period of one week.

The laboratory tests were subdivided by the shift of workers who performed the lab tests. The results are as follows:

shift

Labs test performed    day  evening total

Non-conforming          16      24      40

Conforming                 654   306      960

Total                           670  330    1000

a. construct contingency tables based on total percentages, row percentages, and column percentages.

b. which type of percentage - row, column, or total do you think is most informative for these data? Explain

c. what conclusions concerning the pattern of non-conforming laboratory test can the  laboratory director reach?

Problem

The GMAT scores from a sample of 50 applicants to an MBA program indicate that none of the applicants scores below 450

A frequency distribution was formed by choosing class intervals 450 to 499, 500 to 549 and so on, with the last class having an interval from 700 to 749.

Two applicants score in the interval 450 to 499, and 16 applicants scored in the interval 500 to 549

a. what percentage of applicants scored below 500

b. what percentage of applicants scored between 500 and 549

c. what percentage of applicants scored below 550

d. what percentage of applicants scored below 750

lower limit upper limit frequency

450              499              2

500              549             16

550              599               -

600              649               -

650              699               -

700              749              -

50

A survey asked 1264 women who were their most trusted shopping advisers. The survey results were as follows.

Friends/family                   45

Manufacturer websites        5

News media                      11

Online user reviews           13

Retail websites                  4

Salespeople                      1

Other                              14

a. Construct bar chart, pie chart, and pareto chart

b. Which graphical method so you think is the best for portraying these data

c. What conclusions can you reach concerning women's most trusted shopping advisers?

Problem

As players’ salaries have increased, the cost of attending baseball games has increased dramatically. The following histogram visualizes the total cost (\$) for four tickets, two beers, four soft drinks, four hot dogs, two game programs, two baseball caps, and parking for one vehicle at each of the 30 major league baseball parks during the 2009 season that is stored in BB Cost 2009

What conclusions can you reach concerning the cost of attending a baseball game at different ball parks?

Problem

The file Veggie Burger contains data on the calories and total fat (in grams per serving) for a sample of 12 veggie burgers.

Source: Data extracted from “Healthful Burgers That Taste Good,” Consumer Reports, June 2008, p 8

A. CONSTRUCT A SCATTER PLOT WITH CALORIES ON THE x AXIS AND TOTAL FAT ON THE Y AXIS

B. What conclusions can you reach about the relationship between the calories and total fat in veggie burgers?

Calories Fat

110      3.5

110      4.5

90        3.0

90        2.5

120      6.0

130      6.0

120      3.0

100      3.5

140      5.0

70        0.5

100      1.5

120      1.5

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