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The owner of a local grocery chain claims that the true mean checkout time for customers...

The owner of a local grocery chain claims that the true mean checkout time for customers is less than 12 minutes. In order to test her claim she took a random sample of 64 customers and obtained the sample mean checkout time of 11.4 minutes with a standard deviation of 2.4 minutes. Find the P-Value if we are testing the pair of hypotheses H0 : µ = 12 Ha : µ < 12

0.1587

0.5

0.0228

0.1915

Math   Statistics-And-Probability   
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