reading quiz 12

Question 1

two answers

The sampling distribution of a statistic gives :

Answer 1

• all of the values that a statistic can take
• the probability of each of the possible values of a statistic, assuming H0 is true

Question 2

The _____________ is an actual or theoretical set of population scores that would result if the independent variable had no effect.

Answer 2

null-hypothesis population

Question 3

The standard deviation of the sampling distribution of the mean is also known as the _________________.

Answer 3

standard error of the mean

Question 4

The mean of the sampling distribution of the mean equals _____.

Answer 4

μ

Question 5

The standard deviation (SD) of the sampling distribution of the mean is equal to __________________________________.

Answer 5

the SD of the raw-score population divided by the square root of N

Question 6

true or false

The sampling distribution of the mean is the only sampling distribution used in inferential statistics.

Answer 6

False

Question 7

With alpha set to .05two-tail, the area in each tail equals ____.

Answer 7

2.5%

Question 8

You conduct a z test using an alpha level of .05two-tail (zcrit = ± 1.96). The value of zobt = -1.5. Do you reject or retain the null hypothesis?

Answer 8

Retain the null hypothesis

Question 9

four answers

To use the z test, the following values must be known

Answer 9

• the population mean
• the population standard deviation
• the sample size
• the sample mean

Question 10

Your experiment is using a one-tailed test with an alpha level of .05. Your alternative hypothesis predicts an increase in test scores. The correct value of zcrit for this test is ____________.

Answer 10

+1.645