Question

In: Statistics and Probability

A large national survey shows that the waiting times for fast food restaurants is approximately normally...

A large national survey shows that the waiting times for fast food restaurants is approximately normally distributed with a mean of μ = 3.4 minutes and a standard deviation of σ = 0.6 minutes.

A fast food outlet claims that their mean waiting time in line is less than 3.4 minutes.
To test the claim, a random sample of 60 customers is selected, and is found to have a
mean of 3.3 minutes

Use this sample data to test the fast food outlet's claim at a .05 significance level .

Solutions

Expert Solution

The test statistic is calculated using the formula mentioned. The critical value is obtained from STATKEY(image attached for reference). We compare the test statistic with the critical value and make the required conclusion.

orchestra answered 2 years ago
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