The formula to calculate the degrees of freedom in a paired samples t test is “sample size – 1.” Why is it “minus 1” when it was “minus 2” for the independent samples t test?
What will be an ideal response?
Ans: Because in a paired samples t test, we are really analyzing one set of scores—the difference scores. In an independent samples t test we are analyzing two sets of scores—the two group means.
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Children who have difficulty controlling or moving their bodies may have
a. a learning disability. b. a visual impairment. c. a skeletal abnormality. d. an orthopedic impairment.
In an unstable economic environment, it is no longer true that the more education you possess, the greater your earnings will be.
Answer the following statement true (T) or false (F)
An experiment was done to compare the effect of having a conversation via a hands-free mobile phone, having a conversation with an in-car passenger, and no distraction (baseline) on driving accuracy. Twenty participants from two different age groups (18–25 years and 26–40 years) took part. All participants in both age groups took part in all three conditions of the experiment (in counterbalanced order), and their driving accuracy was measured by a layperson who remained unaware of the experimental hypothesis.
Which of the following sentences regarding the output below is correct?
A. The output shows that the assumption of sphericity has been violated, c2 (2) = 0.81, p = .17. B. The output shows that the assumption of sphericity has been violated, c2 (2) = 3.58, p > .05. C. The output shows that the assumption of sphericity has been met, c2 (2) = 0.81, p > .05. D. The output shows that the assumption of sphericity has been met, c2(2) = 3.58, p = .17.
Which statement about the Common Core State Standards is true?
A. There are standards for speaking and listening. B. These standards are more ambitious than previous expectations. C. There are separate objectives for reading literature and informational texts. D. All of the above