mean=31.18

std. dev=5.17

N=644

max=75

min=20

std. error mean=0.2035

Let represent the mean guess of Dr. Norton's age for all undergraduate students at Clemson. Technically, the collected data are not a random sample. When you don't have a true random sample, which may often be the case, proceed cautiously and ask yourself what population you might be willing to believe the sample results represent. In this example, you might still consider these age guesses to be representative for undergraduate students at Clemson, but you might not be willing to generalize to populations other than students or to others outside of Clemson.

Note: The total undergraduate enrollment at Clemson University is 22,566.

1-Check that the conditions for constructing a confidence interval for have been met.

2-Construct a 90% confidence interval for the population mean age guess. Show your calculations and round your final answer to two decimal places. Note: Show your values plugged into the formula using the "insert > equation" option above your text box. Also, be sure to state the critical t value.

3-At the time of data collection, Dr. Norton was 31 years old. Based on your analysis of the age guess data, comment on how accurately students can guess Dr. Norton's age.