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Chapter 11: Q. 119 (page 668)

Suppose an airline claims that its flights are consistently on time with an average delay of at most 15minutes. It claims that the average delay is so consistent that the variance is no more than 150minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next 25flights. The average delay for those 25flights is 22minutes with a standard deviation of 15minutes.

If an additional test were done on the claim of the average delay, which distribution would you use?

Short Answer

Expert verified

We will use the test of a single mean where the average mean of the population is tested with the hypothesized mean.

Step by step solution

01

Given Information

An airline claims that its average delay of at most 15minutes. It claims that the average delay is so consistent that the variance is no more than 150minutes.

02

Explanation

In statistics, an average is defined as the number that measures the central tendency of a given set of numbers.

A distribution is a function that shows the possible values for a variable and how often they occur.

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