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