Calculate the 90% confidence interval for a sample of N = 21 with a mean = 65.25 and standard error of the mean = 2.57.
A) 90% CI = 65.25 ± 4.43
B) 90% CI = 65.25 ± 7.31
C) 90% CI = 65.25 ± 4.30
D) 90% CI = 65.25 ± 5.36

Question

Calculate the 90% confidence interval for a sample of N = 21 with a mean  = 65.25 and standard error of the mean  = 2.57.
A) 90% CI = 65.25 ± 4.43 
B) 90% CI = 65.25 ± 7.31 
C) 90% CI = 65.25 ± 4.30 
D) 90% CI = 65.25 ± 5.36

Quizplus · Accepted Answer

The Answer of Calculate the 90% confidence interval for a sample of N = 21 with a mean  = 65.25 and standard error of the mean  = 2.57.
A) 90% CI = 65.25 ± 4.43 
B) 90% CI = 65.25 ± 7.31 
C) 90% CI = 65.25 ± 4.30 
D) 90% CI = 65.25 ± 5.36

Calculate the 90% Confidence Interval for a Sample of N