Question 1
From a population with a variance of 900, a sample of 225 items is selected. At 95% confidence, the margin of error is
◦
15
◦
2
◦
3.92
◦
4
Question 2
If an interval estimate is said to be constructed at the 90% confidence level, the confidence coefficient would be
◦
0.1
◦
0.95
◦
0.9
◦
0.05