Use the formula 
to calculate the 95% confidence interval for a sample with a mean 
= 7.00 and a population standard error of the mean 
= .50.
a. 95% CI = 7.00 ± .98
b. 95% CI = 7.00 ± .83
c. 95% CI = 7.00 ± 1.29
d. 95% CI = 7.00 ± 2.46
a. 95% CI = 7.00 ± .98
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