Author Question: A statistically significant difference with the z test means that _____ . a. the population mean ... (Read 160 times)

swpotter12 · **on:** Jun 20, 2018

A statistically significant difference with the z test means that _____ .

a. the population mean is larger than the hypothesized sample value
b. the alpha level was higher than expected by chance alone
c. the sample mean comes from a population with a mean different from the
hypothesized population value
d. the alpha level was lower than expected by chance alone
Information; p 167, E, 2

Question 2

If you obtained a standard score on a history test expressed as z= 0.0 and a standard
score on a mathematics test of z= -0.5, then you did _____ .

a. relatively better on the math test
b. relatively better on the history test
c. better than average on both tests
d. worse than average on both tests