1st Edition

ISBN: 9781938168208

Author: Barbara Illowsky, Susan Dean

Publisher: OpenStax College

Concept explainers

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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Textbook Question

Chapter 4, Problem 107H

In one of its Spring catalogs, Li. Beans advertised footwear on 29 of its 192 catalog pages. Suppose we randomly survey 20 pages. We are interested In the number of pages that advertise footwear. Each page may be picked more than once.

a. In words, define the random variable X.

b. List the values that X may take on.

c. Give the distribution of X. X _____( )

d. How many pages do you expect to advertise footwear on them?

e. Is It probable that all twenty will advertise footwear on them? Why or why not?

f. What is the probability that fewer than ten will advertise footwear on them?

g. Reminder: A page may be picked more than once. We are interested In the number of pages mar we must randomly survey until we find one that has footwear advertised on It. Define the random variable X and give its distribution.

h. What is the probability that you only need to survey at most three pages in order to find one that advertises footwear on it?

I. How many pages do you expect to need to survey in order to find one that advertises footwear?

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Chapter 4, Problem 106H

Chapter 4, Problem 108H

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