#15

Construct the indicated confidence interval for the population mean using the t-distribution. Assume the population is normally distributed.

c=0.95,

x=12.1,

s=3.0,

n=10

_______, _______(round to one decimal places as needed)

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# 16

Use the given confidence interval to find the margin of error and the sample mean.

(15.2,23.4)

The sample mean is _______(type an integer or decimal)