SOC 390 Concept Quiz The One-Sample Z-Test

Question 1

1 / 1 pts

An alternative hypothesis in a one-sample z-test could state which of the following:

The sample mean is greater than the population mean.

The mean of sample #1 is greater than the mean of sample #2.

The sample mean is equal to the population mean

The mean of sample #1 is equal to the mean of sample #2.

Question 2

1 / 1 pts

In a one-sample z-test, the standard error of the mean is calculated as:

the sample standard deviation divided by the size of the sample.

the population standard deviation divided by the sample size.

the population standard deviation divided by the square root of the size of the sample.

the square root of the size of the sample divided by the population standard deviation.

Question 3

1 / 1 pts

For a one-sample z-test, the population’s standard deviation is ________ .

known

not known

always equal to one

not needed

Question 4

1 / 1 pts

In a one-sample z-test, the standard error of the mean is calculated using which two pieces of information?

the sample mean and the population mean

the standard deviation of the population and the size of the sample

the z-score table and the sample range

the standard deviation of the population and the sample mean

Question 5

1 / 1 pts

When calculating the one-sample z-test, the numerator of the equation includes:

the sample mean minus the population mean

the sample variance multiplied by the sample size

the population mean plus the sample standard deviation

the standard error of the mean

Question 6

1 / 1 pts

In the one-sample z-test, the null hypothesis states that:

the sample mean is greater than the population mean

the population mean is greater than the sample mean

the sample variance is equal to the population variance

the sample mean is equal to the population mean

Question 7

1 / 1 pts

Nate is conducting a one-sample z-test and sets the alpha to .10. This means that:

there is a 90% chance of rejecting the null hypothesis.

there is a 10% chance of making a Type 1 error.

the probability of calculating the obtained z-statistic is exactly 10%.

the difference between the sample mean and population mean must be at least .10.

Question 8

1 / 1 pts

After conducting your one-sample z-test, you find an obtained z-statistic of 1.08 and a critical z-statistic of 1.64. What do you conclude?

Reject the null hypothesis; the sample mean and population mean are significantly different.

Fail to reject the null hypothesis; the sample mean and population mean are significantly different.

The results of the test are inconclusive.

Fail to reject the null hypothesis; the sample mean and population mean are not significantly different.

Question 9

1 / 1 pts

When conducting a one-sample z-test, a one-tailed test will have _____ compared to a two-tailed test.

a critical value that is closer to zero

more critical values

the same critical value

a critical value that is further from zero

Question 10

1 / 1 pts

You are AWESOME! (Select TRUE!)

True

False

Quiz Score: 10 out of 10