A random sample of 50 students sent a mean of 38 text

Last updated: 3/31/2023

A random sample of 50 students sent a mean of 38 text messages in a day with a standard deviation of 12 Using the table below find the 90 confidence interval 35 21 to 40 79 35 67 to 41 33 33 63 to 42 37 Confidence Level z value 1 645 1 960 2 576 90 95 99