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

55%

significance level.

x overbarxequals=2323,

nnequals=2727,

sigmaequals=55,

Upper H 0H0:

mu equals 22=22,

Upper H Subscript aHa:

mu not equals 2222

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Part 1

The test statistic is

zequals=enter your response here.

(Round to two decimal places as needed.)