Calculate the 99% confidence interval for a sample of N = 19 with a mean 
= 27.18 and standard error of the mean 
= 2.37.
a. 99% CI = 27.18 ± 4.98
b. 99% CI = 27.18 ± 4.11
c. 99% CI = 27.18 ± 6.82
d. 99% CI = 27.18 ± 5.25
c. 99% CI = 27.18 ± 6.82
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