For a sample with scores of 1, 2, 3, 4, 5, the 95 percent confidence interval about the population mean is
A) 1.04 to 4.96
B) 1.18 to 4.82
C) 1.24 to 4.76

Question

Quizplus · Accepted Answer

The 95% confidence interval is calculated as the sample mean plus or minus 1.96 times the standard error of the mean. The sample mean is 3, and the standard error of the mean is 0.5. Therefore, the 95% confidence interval is 3 plus or minus 1.96 times 0.5, which is 1.04 to 4.96.

For a Sample with Scores of 1, 2, 3, 4