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Chapter 11: Q.112 (page 668)

H0: __________

Short Answer

Expert verified

The value ofH0:σ2≤150

Step by step solution

01

Given information

Given in the question that, Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes. It claims that the average delay is so consistent that the variance is no more than150 minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next 25 flights. The average delay for those 25 flights is22 minutes with a standard deviation of 15 minutes.

02

Explanation

The null hypothesis is shown below:

H0:σ2≤150

that is , the variance is no more than 150.

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Most popular questions from this chapter

Consumers may be interested in whether the cost of a particular calculator varies from store to store. Based on surveying 43 stores, which yielded a sample mean of \(84 and a sample standard deviation of \)12, test the claim that the standard deviation is greater than $15.

Read the statement and decide whether it is true or false:

In a goodness-of-fit test, the expected values are the values we would expect if the null hypothesis were true.

Conduct a goodness-of-fit test to determine if the actual college majors of graduating females fit the distribution of their expected majors.

Major Women -Expected MajorWome -Actual Major
Arts & Humaities 14.0% 670
Biological Sciences
 8.4% 410
Business
 13.1% 685
Education 13.0% 650
Engineering
 2.6% 145
Physical Sciences
 2.6% 125
Professional
 18.9% 975
Social Sciences
 13.0% 605
Technical
 0.4% 15
Other
 5.8% 300
Undecided 8.0% 420

chi-square test statistic = ________

What is the test statistic?
See all solutions

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