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Chapter 9: Q.61 (page 540)

Assume the null hypothesis states that the mean is equal to 88. The alternative hypothesis states that the mean is not

equal to 88. Is this a left-tailed, right-tailed, or two-tailed test?

Short Answer

Expert verified

A two-tailed test is used for the null hypothesis states that the mean is equal to 88.

Step by step solution

01

Introduction

A two-tailed test is a statistical process that determines if a sample is greater or smaller than a certain range of values by using a two-sided critical area of a distribution. It's used in statistical significance testing and null hypothesis testing.

02

Explanation

A two-tailed test is required here as it is undecided whether the mean is higher or lower than 88. Also, the alternative hypothesis(Ha)has a not equal sign indicating that a two-tailed test should be performed here. A two-tailed test is required when the degree of uncertainty is unknown on the higher or lower side.

Also, we can sayH0:p=88Ha:p≠88

A diagram showing a two-tailed test.

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Most popular questions from this chapter

"Untitled," by Stephen Chen

I've often wondered how software is released and sold to the public. Ironically, I work for a company that sells products with

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For statements a-j ( Section: 9.109 ), answer the following in complete sentences.

a. State a consequence of committing a Type I error.

b. State a consequence of committing a Type II error.
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