Report shows that the average person watched 4.55 hours of TV per day in 2005. A...

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Report shows that the average person watched 4.55 hours of TV per day in 2005. A random sample for 20 people showed an average of 4.76. The population standard deviation was 2.297 for last year. Was last year different from 2005? a. State the hypothesis. b. What is the value of a? C. Calculate the z or t statistic. Report shows that the average person watched 4.55 hours of TV per day in 2005. A random sample for 20 people showed an average of 4.76. The population standard deviation was 2.297 for last year. Was last year different from 2005? a. State the hypothesis. b. What is the value of a? C. Calculate the z or t statistic.