Introduction To Statistics And Data Analysis

6th Edition

ISBN: 9781337794503

Author: PECK

Publisher: Cengage

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Textbook Question

Chapter 1.4, Problem 26E

The U.S. Department of Health and Human Services reported the estimated percentage of households with only wireless phone service (no landline) in 2014 for the 50 states and the District of Columbia (cdc.gov/nchs/data/nhis/earlyrelease/wireless_state_201602.pdf, retrieved February 8, 2018). In the accompanying data table, each state was also classified into one of three geographical regions—West (W), Middle states (M), and East (E).

Chapter 1.4, Problem 26E, The U.S. Department of Health and Human Services reported the estimated percentage of households , example 1

Chapter 1.4, Problem 26E, The U.S. Department of Health and Human Services reported the estimated percentage of households , example 2

a. Display the data graphically in a way that makes it possible to compare wireless percent for the three geographical regions.
b. Does the graphical display in Part (a) reveal any striking differences in w ireless percent for the three geographical regions or are the distributions of wireless percent observations similar for the three regions?

Definition Definition Probability of occurrence of a continuous random variable within a specified range. When the value of a random variable, Y, is evaluated at a point Y=y, then the probability distribution function gives the probability that Y will take a value less than or equal to y. The probability distribution function formula for random Variable Y following the normal distribution is: F(y) = P (Y ≤ y) The value of probability distribution function for random variable lies between 0 and 1.

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Chapter 1.4, Problem 25E

Chapter 1.4, Problem 27E

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Chapter 1 Solutions

Introduction To Statistics And Data Analysis

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Solution Summary: The author explains how to display the data graphically in a way that makes it possible to compare wireless percent for the three geographical regions.

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