Question 1

Which of the following is true about correlational designs?

Accepted Answer

A) Finding a relationship between two variables does not mean that one causes the other but could give clues to set up experiments where causality may be determined. 
B) Finding a relationship between two variables NEVER means that one causes the other. 
C) Correlational designs are not very common. 
D) Correlational designs are more powerful than a controlled experiment. A

Question 2

In the section "Can Statistics Solve Every Problem?" your course author argues

Accepted Answer

A) True 
 B)False  False

Question 3

Which of the following is a Type I error?

Accepted Answer

A) rejecting H0 when H0 is false 
B) rejecting H0 when H0 is true 
C) not rejecting H0 when H0 is true 
D) not rejecting H0 when H0 is false B

Question 4

The difference between two means in a controlled experiment that is just attributed to chance or random error is called ___________ in the signal-to-noise ratio.

Accepted Answer

A) signal 
B) to 
C) noise 
D) ratio

Question 5

If a magician claims that he can bend spoons with his mind, what did Carl Sagan propose to test the claim?

Accepted Answer

A) a lie detector test 
B) the baloney detection kit 
C) the salami detection kit 
D) the Atkins detection kit

Question 6

A dependent variable in an experiment can be likened to the ___________ in the signal-to-noise ratio.

Accepted Answer

A) signal 
B) to 
C) noise 
D) ratio

Question 7

Because it is said in science "one experiment does not prove anything," statisticians rely on ___________ to test the usefulness of theories.

Accepted Answer

A) a controlled experiment 
B) at least two experiments 
C) parametric and nonparametric tests 
D) replication

Question 8

In the classic two-group controlled experiment, what parameter is of central interest between the two groups?

Accepted Answer

A) the means 
B) the standard deviations 
C) the sample size 
D) the median

Question 9

The minimum conventional level of statistical significance is ___________.

Accepted Answer

A) .01 
B) .05 
C) .10 
D) .50

Question 10

In the section "Trends, and Does God Really Love the .05 Level of Significance More Than the .06 Level?" Rosnow and Rosenthal have argued that the strength of evidence for or against a null hypothesis should be a fairly continuous function of the size of

Accepted Answer

A) p (the significance level) 
B) beta 
C) the sample size 
D) the size of the standard deviations for each group

Question 11

When findings in an experiment do not reach the conventional level of statistical significance, they are reported to be ___________.

Accepted Answer

A) nonsignificant 
B) insignificant 
C) significant 
D) unworthy

Question 12

The probability of committing the Type II error is also called ___________.

Accepted Answer

A) alpha 
B) beta 
C) delta 
D) omega

Question 13

A trend in the data means that the experimenter

Accepted Answer

A) rejected the null hypothesis at p < .05 
B) rejected the null hypothesis at p < .01 
C) did not reject the null hypothesis but came close to doing so 
D) none of the above

Question 14

The probability of committing the Type I error is also called ___________.

Accepted Answer