15th Edition

ISBN: 9781269927116

Author: Bennett

Publisher: PEARSON

Concept explainers

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of tw…

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency o…

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…

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Textbook Question

Chapter 6.B, Problem 17E

Comparing Variations. Consider the following data sets.

a. Find the mean, median and range for each of the two data sets.

b. Give the five-number summary and draw a boxplot for each of the two data sets.

c. Find the standard deviation for each of the two data sets.

d. Apply the range rule of thumb to estimate the standard deviation of each of the two data sets. How well does the rule work in each case? Briefly discuss why it does or does not work well.

e. Based on all your results compare and discuss the two data sets in terms of their center and variation.

17. Researchers at the Pennsylvania State University conducted experiments with poplar trees in which one group of trees was given fertilizer and irrigation while the other group was given no treatment. The weights in kilograms of trees in the two groups are as follows:

NO treatment:	0.15	0.02	0.16	0.37	0.22
Treatment:	2.03	0.27	0.92	107	2.38

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Chapter 6.B, Problem 16E

Chapter 6.B, Problem 18E

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Chapter 6 Solutions

USING+UNDERSTAND MATH W/MATHLABPLUS >I

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