Question 1
As the sample size increases, the margin of error
◦
increases
◦
decreases
◦
stays the same
◦
increases or decreases depending on the size of the mean
Question 2
Exhibit 8-1
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours.
Refer to Exhibit 8-1. The standard error of the mean is
◦
7.50
◦
0.39
◦
2.00
◦
0.20