1.We have calculated a 95% confidence interval for the difference between two population proportions. The interval is 4% +/- 5%. Can we conclude that there is a significant difference between the two group population proportions? Yes or No? Explain briefly.

2.One thousand students are randomly selected from the list of those currently registered at Harvard University, and they each report how many miles they rode in an MTA bus during the past week. Because many students did not ride a bus at all, a histogram of the values does not look like the normal curve.True or False:Even though the histogram did not follow the normal curve, it is still possible to use the normal curve to make a confidence interval for the average number of miles that all Harvard students rode on MTA buses last week. (Explain briefly why you chose your answer).