Construct a 98% confidence interval to estimate the population mean with x=60 and =13

for the following sample sizes.

a)	n	=	39
b)	n	=	45
c)	n	=	64

a) With 98%

confidence, when

n=39,

the population mean is between the lower limit of=

and the upper limit of=

.

(Round to two decimal places as needed.)

b) With

98%

confidence, when

n=45,

the population mean is between the lower limit of =

and the upper limit of =

(Round to two decimal places as needed.

)c) With

98%

confidence, when

n=64,

the population mean is between the lower limit of =

and the upper limit of =