Quiz: The t-Test for Two Related Samples
• Due Jan 27 at 11:59pm
• Points 40
• Questions 16
• Time Limit 60 Minutes
Instructions
The quiz:
• Covers the Learn material from Module 2: Week 2.
• Contains 16 multiple-choice and true/false questions.
• Is limited to 1 hour.
• Allows 1 attempt.
• Is worth 40 points.
Submit this assignment by 11:59 p.m. (ET) on Monday of Module 2: Week 2.
Attempt History
Attempt Time
LATEST Attempt 1 40 minutes
Correct answers are hidden.
Score for this quiz: 40 out of 40
Submitted Jan 24 at 4:11pm
This attempt took 40 minutes.
, Question 1
2..5 pts
In general, if the variance of the difference scores increases, what will happen to the
value of the t statistic?
It will increase in magnitude (move farther toward the tail of the distribution).
It will decrease in magnitude (move toward 0 at the center of the distribution).
It will stay the same; the t statistic is not affected by the variance of the difference
scores.
It may increase or may decrease; there is no consistent relationship between variance
and the size of the t statistic.
Question 2
2..5 pts
Compared to an independent-measures design, a repeated-measures study is more
likely to find a significant effect because it reduces the contribution of variance due to
.
time-related factors
order effects
the effect of the treatment
individual differences
Question 3
2..5 pts
A researcher conducts a repeated-measures study to evaluate a treatment with a
sample of n = 16 participants and obtains a t statistic of t = 1.94. The treatment is
expected to increase scores and the sample mean shows an increase. Which of the
following is the correct decision for a hypothesis test using α = .05?
• Due Jan 27 at 11:59pm
• Points 40
• Questions 16
• Time Limit 60 Minutes
Instructions
The quiz:
• Covers the Learn material from Module 2: Week 2.
• Contains 16 multiple-choice and true/false questions.
• Is limited to 1 hour.
• Allows 1 attempt.
• Is worth 40 points.
Submit this assignment by 11:59 p.m. (ET) on Monday of Module 2: Week 2.
Attempt History
Attempt Time
LATEST Attempt 1 40 minutes
Correct answers are hidden.
Score for this quiz: 40 out of 40
Submitted Jan 24 at 4:11pm
This attempt took 40 minutes.
, Question 1
2..5 pts
In general, if the variance of the difference scores increases, what will happen to the
value of the t statistic?
It will increase in magnitude (move farther toward the tail of the distribution).
It will decrease in magnitude (move toward 0 at the center of the distribution).
It will stay the same; the t statistic is not affected by the variance of the difference
scores.
It may increase or may decrease; there is no consistent relationship between variance
and the size of the t statistic.
Question 2
2..5 pts
Compared to an independent-measures design, a repeated-measures study is more
likely to find a significant effect because it reduces the contribution of variance due to
.
time-related factors
order effects
the effect of the treatment
individual differences
Question 3
2..5 pts
A researcher conducts a repeated-measures study to evaluate a treatment with a
sample of n = 16 participants and obtains a t statistic of t = 1.94. The treatment is
expected to increase scores and the sample mean shows an increase. Which of the
following is the correct decision for a hypothesis test using α = .05?
