Assume that Friday morning taxi-cab rides have times with a standard deviation of

=10.2 minutes. A cab driver records times of rides during a Friday afternoon time period and obtains these statistics: n=12, x=17.9 minutes, s=12.4 minutes. Use a 0.01 significance level to test the claim that these Friday afternoon times have greater variation than the Friday morning times. Assume that the sample is a simple random sample selected from a normally distributed population.

Let denote the population standard deviation of Friday afternoon cab-ride times.

Identify the null and alternative hypotheses.

(Type integers or decimals. Do not round.) Identify the test statistic. (Round to two decimal places as needed.) Identify the P-value. (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. __________ the null hypothesis. There _______ sufficient evidence to __________ the claim that the Friday afternoon cab-ride times have greater variation than the Friday morning times.