(a) A magazine claims that the average college student watches less television than the general public. The national ave

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A A Magazine Claims That The Average College Student Watches Less Television Than The General Public The National Ave 1 (53.44 KiB) Viewed 53 times

(a) A magazine claims that the average college student watches less television than the general public. The national average is 29 hours per week, with a standard deviation of 5 hours. A sample of 36 college students has a mean of 27 hours. i. Is there enough evidence to support the claim at a = 0.01? ii. Find the 99% confidence interval of the population mean of watches television. (b) The average local cell phone call length was reported to be 2.40 minutes. A random sample of 25 phone calls showed an average of 3.00 minutes in length with a standard deviation of 0.98 minute. At a = 0.05, can it be concluded that the average differs from