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Chapter 9: Q.2 (page 546)

A Gallup Poll report on a national survey of 1028 teenagers revealed that 72% of teens said they seldom or never argue with their friends. Yvonne wonders whether this national result would be true in her large high school. So she surveys a

a random sample of 150 students at her school.

Short Answer

Expert verified

The total population of teens is 0.72for null hypothesis and the population is not equal to 0.72for alternative hypothesis.

Step by step solution

01

introduction

Given,

Teens that said they seldom or never argue with their friends is72%

Sample size is 150150

Using null and alternative hypotheses we calculate.

02

explanation

Population value is72%as per the null hypothesis

⇒H0:p=0.72

Population value is not 72%as per the alternative hypothesis

⇒Ha:p≠0.72

The total population of teens is 0.72for null hypothesis and the population is not equal to 0.72for alternative hypothesis.

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Most popular questions from this chapter

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One-sided test Suppose you carry out a significance test of H0:μ=5versus Ha:μ>5based on a sample of size n=20and obtain t=1.81.

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