Introduction To Statistics And Data Analysis

6th Edition

ISBN: 9781337794503

Author: PECK

Publisher: Cengage

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Textbook Question

Chapter 4, Problem 66CR

For the data of Exercise 4.64, multiply each data value by 10. How does s for the new values compare to s for the original values? More generally, what happens to s if each observation is multiplied by the same positive constant c?

4.64 Although bats are not known for their eyesight, they are able to locate prey (mainly insects) by emitting high-pitched sounds and listening for echoes. A paper appearing in Animal Behaviour (“The Echolocation of Flying Insects by Bats” [1960]: 141–154) gave the following distances (in centimeters) at which a bat first detected a nearby insect:

Chapter 4, Problem 66CR, For the data of Exercise 4.64, multiply each data value by 10. How does s for the new values compare

a. Calculate the sample mean distance at which the bat first detects an insect.
b. Calculate the sample variance and standard deviation for this data set. Interpret these values.

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Chapter 4, Problem 65CR

Chapter 4, Problem 67CR

Chapter 4 Solutions

Introduction To Statistics And Data Analysis

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Solution Summary: The author explains how the sampling variance of the new observation and the original sample are compared to the deviations from the mean.

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