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09-05-2024
Mathematics

Answered

The 2012 general Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours was 3.09 with a standard deviation of 2.87 . Assume that in a sample of 34 teenagers, the sample standard deviation of daily TV time is 2.6 hours, and that the population of TV watching times is normally distributed. Can you conclude that the population standard deviation of TV watching times for teenagers is less than 2.87 ? Use the =α0.05 level of significance. H0: a = 2.87 H1: = a < 2.87 this is a left tailed test What is my critical value?

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