The monthly incomes for 1212 randomly selected people, each with a bachelor's degree in economics, are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 4450.644450.64 4596.364596.36 4366.154366.15 4455.354455.35 4151.254151.25 3727.353727.35 4283.284283.28 4527.054527.05 4407.644407.64 3946.923946.92 4023.674023.67 4221.664221.66 (a) Find the sample mean. x overbarxequals=4263.14263.1 (Round to one decimal place as needed.) (b) Find the sample standard deviation. sequals=260.0260.0 (Round to one decimal place as needed.) (c) Construct a 9595% confidence interval for the population mean muμ. A 9595% confidence interval for the population mean is (nothing,nothing). (Round to one decimal place as needed.)

The monthly incomes for 1212 randomly selected people, each with a bachelor's degree in economics, are shown on the right. Complete parts (a) through (c) below. Assume the population is normally...

The monthly incomes for

1212

randomly selected people, each with a bachelor's degree in economics, are shown on the right. Complete parts (a) through (c) below.

Assume the population is normally distributed.

(a) Find the sample mean.

x overbarxequals=4263.14263.1

(Round to one decimal place as needed.)

(b) Find the sample standard deviation.

sequals=260.0260.0

(Round to one decimal place as needed.)

9595%

confidence interval for the population mean

muμ.

9595%

confidence interval for the population mean is

(nothing,nothing).

(Round to one decimal place as needed.)

Jun 05, 2022