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# A z-test was conducted to determine whether the mean selling price of homes in the Denver area is \$225,000 or

not. What is the decision rule?

Fail to Reject H0 if z > 1.96 or if z < -1.96

Reject H0 if z > -1.96 or if z < 1.96

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Reject H0 if z > 1.96 or if z < -1.96

Reject H0 if z > 1.65 or if z < -1.65

Reject H0 if z > 2.58 or if z < -2.58

A z-test was conducted to determine whether the mean selling price of homes in the Denver area is \$225,000 or not. What is the null hypothesis?

H0: µ = 225,000

H0: µ ≠ 225,000

H1: µ = 225,000

H1: µ ≠ 225,000

H0: md = 0

H1: md ≠ 0

Daniel is conducting a hypothesis test to determine whether a sample of 55 APU students is the same as a population. He doesn’t have the population standard deviation. What should he do?

use the z distribution and ignore the missing standard deviation

use the z distribution in the hypothesis test, and use the t distribution to account for the missing population standard deviation

use the z distribution and substitute the sample variance for the missing population standard deviation, but change the denominator to n-1 to make a more conservative estimate

use the F distribution and substitute the sample standard deviation for the missing population standard deviation

use the t distribution and substitute the sample standard deviation for the missing population standard deviation

use the z distribution and substitute the sample standard deviation for the missing population standard deviation

For what purpose is the .01 significance level used?

quality assurance

consumer research

political polling

decision rule

all hypothesis tests in psychology and sociology

For what purpose is the .10 significance level used?

quality assurance

consumer research

political polling

decision rule

all hypothesis tests in psychology and sociology