Suppose you would like to know the average daily number of car
crashes that occur at your hometown. With that in mind,
you take a sample of 15 days where you record the number of car
crashes at your hometown on each of those days. The data
are displayed below:
12, 7, 17, 11, 9, 8, 19, 22, 12, 17, 15, 9, 12, 21,
15
a) Please calculate the sample average.
b) Please calculate the standard error of the sample
average. (Please make sure to show your
calculations.)
c) Your friend claims that the population average
(mean) for the...