The 2001 general Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours was 4.7 with a standard deviation of 2. Assume that in a sample of 50 teenagers, the sample standard deviation of daily TV time is 2.1 hours, and that the population of TV watching times is normally distributed. Under 1% significance level can you conclude that the population standard deviation of TV watching times for teenagers is greater than 2?

Procedure: Select an answer One variance χ² Hypothesis Test One mean T Hypothesis Test One proportion Z Hypothesis Test One mean Z Hypothesis Test

Assumptions: (select everything that applies)