10) A local retailer claims that the mean waiting time is less than 8 minutes. A

Question

10) A local retailer claims that the mean waiting time is less than 8 minutes. A random sample of 20 waiting times has a mean of 6.4 minutes with a standard deviation of 2.1 minutes. At alpha = 0.01, test the retailer's claim. Assume the distribution is normally distributed A) p-value 0.0015; fail to reject H0; We do not have enough evidence to support the Retailer's claim that the mean waiting time is less than 8 minutes. B) p-value 0.00 15; reject H0; We have enough evidence to support the retailer's claim that the mean waiting time is less than 8 minutes. C) p-value 0.9985; fail to reject H0; We do not have enough evidence to support the Retailer's claim that the mean waiting time is less than 8 minutes. D) p-value 0.9985; reject H0; We have enough evidence to support the retailer's claim that the mean waiting time is less than 8 minutes. E) p-value = 0.0030; fail to reject H0; We do not have enough evidence to support the Retailer's claim that the mean waiting time is less than 8 minutes. F) None of the above

Explanation / Answer

C is correct answer ---> 100% sure

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