1. Mr. Jones is interested in determining how long it takes his students to write essays for his class.
The table below shows the mean and standard deviation for the length of time to write an essay (in minutes) for a random sample of 20 AP Statistics students and a random sample of 25 physics Honors students. (These are from all students he has had through the years)
Based on the histogram of the data, it is not unreasonable to assume the distribution of essay times is approx normal.
a. Estimate the mean difference in essay completion times for all AP Statistics and Physics Honors students In Mr. Jone's classes.
b. Based only on this confidence interval, do you think the difference in the mean wait times is statistically significant? Justify your answer.
