Stats: Modeling the World Nasta Edition Grades 9-12
Stats: Modeling the World Nasta Edition Grades 9-12
3rd Edition
ISBN: 9780131359581
Author: David E. Bock, Paul F. Velleman, Richard D. De Veaux
Publisher: PEARSON
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Chapter 5, Problem 7E

a)

To determine

To explain features of the distribution from Histogram and boxplot.

a)

Expert Solution
Check Mark

Answer to Problem 7E

The Histogram and boxplot shows the distribution unimodal and right skewed.

Explanation of Solution

Given:

  Stats: Modeling the World Nasta Edition Grades 9-12, Chapter 5, Problem 7E , additional homework tip  1

Calculation:

The Histogram and boxplot shows the distribution unimodal and right skewed. There are two outliers shows around 37 and 47. The median is close to 19.

b)

To determine

To explain features of the distribution, include on Histogram but not in boxplot.

b)

Expert Solution
Check Mark

Answer to Problem 7E

The unimodal shape of the distribution.

Explanation of Solution

Given:

  Stats: Modeling the World Nasta Edition Grades 9-12, Chapter 5, Problem 7E , additional homework tip  2

Calculation:

The Histogram suggests that the distribution unimodal with increasing between 22 and 24. This shape does not see clear in Boxplot.

c)

To determine

To explain which summary statistics is useful to summarize the center of the distribution.

c)

Expert Solution
Check Mark

Answer to Problem 7E

Median.

Explanation of Solution

Given:

  Stats: Modeling the World Nasta Edition Grades 9-12, Chapter 5, Problem 7E , additional homework tip  3

Calculation:

As the shape of the distribution is right skewed, I would prefer median as an appropriate summary statistic.

d)

To determine

To explain which summary statistics is useful to summarize the spread of the distribution.

d)

Expert Solution
Check Mark

Answer to Problem 7E

IQR.

Explanation of Solution

Given:

  Stats: Modeling the World Nasta Edition Grades 9-12, Chapter 5, Problem 7E , additional homework tip  4

Calculation:

As the shape of the distribution is right skewed, I would prefer IQR as an appropriate summary statistic.

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