In: Math
Determine the margin of error for a 99% confidence interval to estimate the population mean when s =39 for the sample sizes below.
| 
 a)  | 
 n=14  | 
| 
 b)  | 
 n=34  | 
| 
 c)  | 
 n=53  | 
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Construct a 90% confidence interval to estimate the population mean when x overbarx =122 and s =26
for the sample sizes below.
a) n=40
b)n=50
c)n=100