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 4, Problem 19E

(a)

To determine

To find: that the mean closer to $2.40, $2.60$ or $2.80.

(a)

Expert Solution
Check Mark

Explanation of Solution

Given:

  Stats: Modeling the World Nasta Edition Grades 9-12, Chapter 4, Problem 19E , additional homework tip  1

By seeing the histogram, it is observed that, it is approximately symmetric and unimodal. Mean and standard deviation would be the best measure of the centre because of symmetric histogram. Mean is looking at the balancing point of the graph and this graph is close to 2.6 in comparison to 2.4 or 2.8.

(b)

To determine

To find: that the standard deviation closer to $0.15, $0.50 or $1.00.

(b)

Expert Solution
Check Mark

Explanation of Solution

Given:

  Stats: Modeling the World Nasta Edition Grades 9-12, Chapter 4, Problem 19E , additional homework tip  2

Both $0.5 and $1.00 extend the standard deviation outside of the range of the data. In generally, the number of data points within one standard deviation of the mean is about 68% of all of the data points.

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