Question 1
How is the T-test for related samples performed?
Selected: a. By conducting a one sample t-test on the sample of
difference scoresThis answer is correct.
b. By conducting an independent samples t-test on the sample of
difference scores
c. By converting the scores to standard scores and then performing a
related samples t-test
d. By measuring the population variance and testing it using an
independent samples t-test
Correct! The t-test for related samples is performed by conducting a one
sample T-test on the sample of difference scores.
1/1
Question 2
What does the error bar on an error bar chart represent?
a. the confidence interval round the mean
b. the standard error of the mean
c. the standard deviation of the mean
Selected: d. all of the aboveThis answer is correct.
Correct! An error bar can represent the confidence interval round the mean,
the standard error of the mean or the standard deviation of the mean.
1/1
Question 3
Daniel conducted an independent samples t-test and found t(20) = 0.57, p >
.05. He then calculated his effect size and obtained a value of d = 0.02. What
should Daniel say in the report on his results?
a. He should recheck his calculations because a t-value of 0.57 is not
possible.
Selected: b. He should indicate his T-test is not significant. He should,
therefore, not report his effect size.This answer is correct.
c. He should indicate he has obtained a significant test result, with a
small effect size.
d. He should indicate his t-test is not significant, and that his effect size
is a small one.
Correct! Daniel should say that his t-test is not significant. He should,
, therefore, not report his effect size.
1/1
Question 4
Eighteen obese volunteers weighed themselves before and after a two-day
fast. What is the appropriate design for testing the significance of the
difference between the means?
a. Independent samples t-test
b. Z-test
Selected: c. Paired samples t-testThis answer is correct.
d. One sample t-test
Correct! The appropriate design for testing the significance of the difference
between the means is the paired samples t-test.
0/1
Question 5
Consider this table. What was the dependent variable?
Independent Samples Test Ttest for Equ
t d
number of answers correct Equal variances assumed 10.991 3
Equal variances not assumed 10.991 3
a. variances
b. number of answers correct
Selected: c. equal assumptionsThis answer is incorrect.
d. not given in table
Try Again. The dependent variable is number of answers correct. You can also
get related information in Chapter 9 of your textbook.
0/1
Question 6
Consider this table. How many people took part in this experiment?
Independent Samples Test Ttest for
, t df
number correct Equal variances assumed 10.991
Equal variances not assumed 10.991 30.7
a. 37
Selected: b. 38This answer is incorrect.
c. 39
d. 40
Try Again. 40 people took part in this experiment, computed as 38 +1+1 or
38 same as n1+n2-2. You can also get related information in Chapter 9 of
your textbook.
0/1
Question 7
A repeated measures design would be appropriate for which of the following
situations?
a. A researcher would like to study the effect of alcohol on reaction
time.
Selected: b. A researcher would like to compare individuals from at
least two populations.This answer is incorrect.
c. The effect of a new treatment is studied in a small group of
individuals with rare conditions.
d. Both a and b
Try Again. A repeated measures design would be appropriate for a researcher
who would like to study the effect of alcohol on reaction, or a researcher who
would like to compare individuals from at least two populations. You can also
get related information in Chapter 9 of your textbook.
1/1
Question 8
How is the null hypothesis of the independent samples t-test verbalized?
a. There is a relationship between the independent variable and the
dependent variable.
b. The difference between the sample means is equal to µ.
c. The independent variable has an effect on the dependent variable.
Selected: d. There is no relationship between the independent variable
and the dependent variable.This answer is correct.
Correct! The null hypothesis of the independent samples t-test is verbalized
How is the T-test for related samples performed?
Selected: a. By conducting a one sample t-test on the sample of
difference scoresThis answer is correct.
b. By conducting an independent samples t-test on the sample of
difference scores
c. By converting the scores to standard scores and then performing a
related samples t-test
d. By measuring the population variance and testing it using an
independent samples t-test
Correct! The t-test for related samples is performed by conducting a one
sample T-test on the sample of difference scores.
1/1
Question 2
What does the error bar on an error bar chart represent?
a. the confidence interval round the mean
b. the standard error of the mean
c. the standard deviation of the mean
Selected: d. all of the aboveThis answer is correct.
Correct! An error bar can represent the confidence interval round the mean,
the standard error of the mean or the standard deviation of the mean.
1/1
Question 3
Daniel conducted an independent samples t-test and found t(20) = 0.57, p >
.05. He then calculated his effect size and obtained a value of d = 0.02. What
should Daniel say in the report on his results?
a. He should recheck his calculations because a t-value of 0.57 is not
possible.
Selected: b. He should indicate his T-test is not significant. He should,
therefore, not report his effect size.This answer is correct.
c. He should indicate he has obtained a significant test result, with a
small effect size.
d. He should indicate his t-test is not significant, and that his effect size
is a small one.
Correct! Daniel should say that his t-test is not significant. He should,
, therefore, not report his effect size.
1/1
Question 4
Eighteen obese volunteers weighed themselves before and after a two-day
fast. What is the appropriate design for testing the significance of the
difference between the means?
a. Independent samples t-test
b. Z-test
Selected: c. Paired samples t-testThis answer is correct.
d. One sample t-test
Correct! The appropriate design for testing the significance of the difference
between the means is the paired samples t-test.
0/1
Question 5
Consider this table. What was the dependent variable?
Independent Samples Test Ttest for Equ
t d
number of answers correct Equal variances assumed 10.991 3
Equal variances not assumed 10.991 3
a. variances
b. number of answers correct
Selected: c. equal assumptionsThis answer is incorrect.
d. not given in table
Try Again. The dependent variable is number of answers correct. You can also
get related information in Chapter 9 of your textbook.
0/1
Question 6
Consider this table. How many people took part in this experiment?
Independent Samples Test Ttest for
, t df
number correct Equal variances assumed 10.991
Equal variances not assumed 10.991 30.7
a. 37
Selected: b. 38This answer is incorrect.
c. 39
d. 40
Try Again. 40 people took part in this experiment, computed as 38 +1+1 or
38 same as n1+n2-2. You can also get related information in Chapter 9 of
your textbook.
0/1
Question 7
A repeated measures design would be appropriate for which of the following
situations?
a. A researcher would like to study the effect of alcohol on reaction
time.
Selected: b. A researcher would like to compare individuals from at
least two populations.This answer is incorrect.
c. The effect of a new treatment is studied in a small group of
individuals with rare conditions.
d. Both a and b
Try Again. A repeated measures design would be appropriate for a researcher
who would like to study the effect of alcohol on reaction, or a researcher who
would like to compare individuals from at least two populations. You can also
get related information in Chapter 9 of your textbook.
1/1
Question 8
How is the null hypothesis of the independent samples t-test verbalized?
a. There is a relationship between the independent variable and the
dependent variable.
b. The difference between the sample means is equal to µ.
c. The independent variable has an effect on the dependent variable.
Selected: d. There is no relationship between the independent variable
and the dependent variable.This answer is correct.
Correct! The null hypothesis of the independent samples t-test is verbalized
