SOC 390 Concept Quiz The Two-Sample t-Test

Question 1

1 / 1 pts

The null hypothesis in an independent-samples t-test would be stated as which of the following:

The mean of the sample is not equal to the mean of the population.

The mean of the sample is equal to the mean of the population.

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

The mean of sample 1 is not equal to the mean of sample 2.

Question 2

1 / 1 pts

The _______ assumption of the independent samples t-test states that the amount of variability in both groups should be equal.

equality of mean

independence

homogeneity of variance

normality of data

Question 3

1 / 1 pts

The independent-samples t-test should be used when participants are test multiple times and have scores in each of the groups being tested.

True

False

Question 4

1 / 1 pts

The independent samples t-test is used when you are looking at the difference in the mean of a variable between _______ group(s) that are _______ of one another.

one; dependent

one; independent

two; independent

two; dependent

Question 5

1 / 1 pts

The degrees of freedom for an independent samples t-test is calculated by:

using a complex formula that integrates the sample sizes and sample variances.

taking the sample size of one group and subtracting one.

adding the size of the two samples and subtracting two.

taking the sample size of one group and subtracting the sample size of the second group.

Question 6

1 / 1 pts

Brenda is calculating a two-sample t-statistic. What value should she plug in for se?

The sample size for Group 1

The standard error

The standardized equation

The statistical equivalent

Question 7

1 / 1 pts

Paul conducts an independent samples t-test and reports the following results: t = 2.72 and p<.05. What can you conclude?

The results are important.

The results are statistically significant.

The results are unknown.

There is no statistical significance in the test.

Question 8

1 / 1 pts

When conducting the independent samples t-test, a researcher must know the mean of the population.

True

False

Question 9

1 / 1 pts

Karl is conducting an independent samples t-test to examine whether there are differences in the average hours of sleep between a sample of men and women. What is Karl’s dependent variable?

Gender

Hours of sleep

Question 10

1 / 1 pts

You CAN do statistics! (Select TRUE!)

True

False

Quiz Score: 10 out of 10