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Chapter 11: Q.111 (page 668)

Is this a right-tailed, left-tailed, or two-tailed test?

Short Answer

Expert verified

The test is right-tailed test.

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 than 150 minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next25 flights. The average delay for those 25 flights is 22 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.

Against the alternative hypothesis as shown below:

Ha:σ2>150

That is, the variance is more than 150.

The alternative hypothesis sign that is ">" tells that the test is right-tailed test.

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Most popular questions from this chapter

Graph the situation. Label and scale the horizontal axis. Mark the mean and test statistic. Shade the p-value.

a. Explain why a goodness-of-fit test and a test of independence are generally right-tailed tests.

b. If you did a left-tailed test, what would you be testing?

Do men and women select different breakfasts? The breakfasts ordered by randomly selected men and women at a popular breakfast place are shown in Table. Conduct a test for homogeneity at a 5%level of significance.

French ToastPancakesWafflesOmelettesMen47352853Women65595560

Where is μlocated on a chi-square curve?

Some travel agents claim that honeymoon hot spots vary according to the age of the bride. Suppose that 280recent brides were interviewed as to where they spent their honeymoons. The information is given in Table 11.46. Conduct a test of independence

Location20-2930-3940-4950and over
Niagara Falls15252520
Poconos15252510
Europe1025155
Virgin Islands2025155
See all solutions

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