The state test scores for 12 randomly(#'s located on the side) selected high school seniors are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 1428 1224 980 694 729 832 722 741 543 621 a) Find the sample mean.x=(Round to one decimal place as needed.)(b) Find the sample standard deviation.s=(Round to one decimal place as needed.)(c) Construct a 99% confidence interval for the population mean μ.A 99% confidence interval for the population mean is ( , ).

The state test scores for 12 randomly(#'s located on the side) selected high school seniors are shown on the right. Complete parts (a) through (c) below. Assume the population is normally...

The state test scores for

12 randomly(#'s located on the side) selected high school seniors are shown on the right. Complete parts (a) through (c) below.

Assume the population is normally distributed.

a) Find the sample mean.

(Round to one decimal place as needed.)

(b) Find the sample standard deviation.

(Round to one decimal place as needed.)

μ.

A 99% confidence interval for the population mean is

( , ).

Jun 09, 2022