Given the sample mean of GPA, the sample SD, and the SE below:

Question

SM: 3.2454
SD: 0.4635
SE: 0.0309

constructa 95% confidence interval for the population mean gpa?

my answer: 3.2454+0.0309 = 3.2763-0.0.0309=1.2454

Answer 1

Interval is: 3.2145 to 3.2763

3.2454 + 0.0309 = 3.2763
3.2454 - 0.0309 = 3.2145

Explanation:
3.2454 is the mean. Therefore, you take the mean ± SE (which is 0.0309) to determine your interval.