3 & 4

G webassign.net + ome br... 20== 201... Jerome B. Classes c Cengage.. AP Stats,. #4 2022.. #5 2022.. #6 2022.. #1 2022.. #3 2022 3 Points] DETAILS YMSSTAT2 11.E.004. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER What critical value t* from Table C should be used for a confidence interval for the mean of the population in each of the following situations? (a) A 95% confidence interval based on n = 4. (b) A 99% confidence interval from an SRS of 16 observations. (c) A 90% confidence interval from a sample size of 29 observations. [-/5 Points] DETAILS YMSSTAT2 11.E.015. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Do piano lessons improve the spatial-temporal reasoning of preschool children? Neurobiological arguments suggest that this may be true. A study designed to test this hypothesis measured the spatial- temporal reasoning of 16 preschool children before and after six months of piano lessons. (The study also included children who took computer lessons and a control group; but we are not concerned with those here.) The changes in the reasoning scores are given below. -236 0215 -1 603 -3388 7 (a) Find the mean, the standard deviation, and the standard error of the mean. X = S = SEM = (b) Give a 90% confidence Interval for the mean improvement in reasoning scores lower bound upper bound MacBook Air 80 389 DD