Construct a 98% confidence interval to estimate the population mean when

x overbar =61 and s=12.4 for the sample sizes below

a)

n=19

b)

n=45

c)

n=57

a)The 98% confidence interval for the population mean when n =19 is from a lower limit of

____ to an upper limit of ____

(Round to two decimal places asneeded.)

b)The 98% confidence interval for the population mean when n=45 is from a lower limit of

____to an upper limit of_____

(Round to two decimal places asneeded.)

c)The 98% confidence interval for the population mean when n=57 is from a lower limit of

___to an upper limit of________

(Round to two decimal places asneeded