Exam 2 Review

Question 1

Studying heart rate differences for 10 obese and 12 non-obese children after Dance Dance Revolution for 12 min. Test?

Accepted Answer

independent-samples t test

Question 2

What is the denominator of the ratio for the paired-samples t test statistic?

Accepted Answer

estimated std. error for the difference of difference scores

Question 3

All else being equal, as n decreases, the critical value of t

Accepted Answer

is father from 0

Question 4

What type of test should be used to compare a sample with a population for which we know the M but not the SD?

Accepted Answer

Single-sample t test

Question 5

If a researcher fails to reject the null hypothesis when the null hypothesis is false, then they have:

Accepted Answer

made a Type II error

Question 6

When calculating a confidence interval for a paired-samples t test, what value should be at the center?

Accepted Answer

the difference between the sample means

Question 7

If a paired-samples t test shows a difference between two treatments, then we:

Accepted Answer

reject the null hypothesis

Question 8

In hypothesis testing, we:

Accepted Answer

are always testing the null hypothesis

Question 9

Which of the following is a valid effect size measure for a single-sample t test?

Accepted Answer

Cohen's d

Question 10

One benefit of within-subjects designs is that they control for:

Accepted Answer

individual differences

Question 11

_____ is a weighted avg of the two estimates of variance when conducting an independent-samples t test

Accepted Answer

pooled variance

Question 12

The probability of a Type II error is:

Accepted Answer

known as beta

Question 13

The _____ hypothesis assumes that there is a difference between populations.

Accepted Answer

alternative

Question 14

Participants read either funny or not funny sentences then later tested memory of the sentences. Null hypothesis is:

Accepted Answer

There's no difference in the memory for funny and not funny sentences

Question 15

In a within-subjects design with two groups, the appropriate hypothesis test is a(n):

Accepted Answer

Paired-samples t test

Question 16

If two samples of the same people are measured at two time points, the appropriate test is:

Accepted Answer

paired-samples t test

Question 17

A two-sample t test where one sample is connected to the cases in the other is a:

Accepted Answer

Paired-samples t test

Question 18

If our tcv is 2.015 and our t test statistics is 2.012, what can we conclude?

Accepted Answer

Fail to reject the null hypothesis

Question 19

For an independent-samples t test with n = 22 in each group, what is the df?

Accepted Answer

42

Questions 19