Suppose you survey 12 men and 18 women. You ask them how much time they spend watching TV per day, on average. The average for the men was 2.4 hours with a standard deviation of 0.6 hour. The average for the women was 1.8 hours, with a standard deviation of 0.4 hours. Find a 95% confidence interval for the difference in average time spent watching TV between men and women.
What is tĪ±/2?
a. 2.048
b. 1.701
c. 1.96
