Calculate the margin of error and construct the confidence interval for the population mean using the Student's t-distribution (you may assume the population data is normally distributed).

T-Distribution Table.

a.x=84.9,n=67,s=14.8,

E=

Round to two decimal places if necessary

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Round to two decimal places if necessary

b.x=36.2,n=43,s=19.7,

E=

Round to two decimal places if necessary

<<

Round to two decimal places if necessary