A sample mean, sample size, and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the

11%

significance level.

x overbarxequals=3030,

nnequals=4040,

sigmaequals=44,

Upper H 0H0:

mu equals 32=32,

Upper H Subscript aHa:

mu less than 32<32

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Part 1

The test statistic is

zequals=enter your response here.

(Round to two decimal places as needed