Multiple Choice
Use the formula 
to calculate the 90% confidence interval for a sample of N = 12 with a mean 
= 4.00 and standard error of the mean 
= .58.
A) 90% CI = 4.00 ± 1.04
B) 90% CI = 4.00 ± 1.80
C) 90% CI = 4.00 ± 2.38
D) 90% CI = 4.00 ± 1.28
Correct Answer:
Verified
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B)
