Let's practice on how to interpret the confidence interval. You must use the format that I introduced in the lecture videos (Videos from the Instructor). You will still get credit for the participation if youinterpret in another way; however it will lead to little credit or no credit when working on the free respond questions in the exams.

1) The first sample had 30 trees with a mean circumference of 15.71 inches, and standard deviation of 4.63 inches. A 95% confidence interval for the mean circumference of aspen trees from this data is found as(13.98, 17.44). Interpret this confidence interval.

2) Suppose in a state with a large number of voters that 56 out of 100 randomly surveyed voters favored Proposition X. A 95% confidence interval for the proportion of all voters who favored Proposition X can be found as (0.462, 0.653). Interpret this confidence interval.

3) Given thatx=50,s=5.02,n=16x=50 ,s=5.02,n=16.Assume that the underlying population is normally distributed. Hence, a 95% confidence interval for the population standard deviation can be found as (3.804, 8.194). Interpret this confidence interval.