Pnull _________.
a. always equals 1 - Preal
b. never equals 0.50
c. always equals 0.50
d. equals 0.50, ?5= 0.50, or ?4= 0.50, depending on H1
Preal is defined as _________.
a. the probability of getting a plus with any subject in the sample of the experiment when the independent variable has a real effect
b. the probability of getting a plus with any subject in the sample of the experiment when the independent variable has no effect
c. the probability of getting a plus with any subject in the sample of the experiment when chance alone is at work
d. the probability of getting a plus with any subject in the sample of the experiment when the independent variable has a real effect in the direction predicted by the directional H1
Pnull is defined as _________.
a. the probability of getting a plus with any subject in the sample of the experiment when the independent variable has no effect in the direction predicted by a directional H1
b. the probability of getting a plus with any subject in the sample of the experiment when the independent variable has a real effect
c. the probability of getting a plus with any subject in the sample of the experiment when the independent variable has an effect in the direction predicted by a directional H1
d. the probability of getting a plus with any subject in the sample of the experiment when the independent variable has no effect.
A real effect of the independent variable is defined as _________.
a. all possible effects including no change in the dependent variable
b. any effect that produces a change in the dependent variable
c. an effect that produces an increase in the value of the dependent variable
d. an effect showing no change in the dependent variable
Power is defined as ______.
a. the probability of rejecting H0 if H0 is false
b. the probability of accepting H1 if H1 is true
c. the probability of rejecting H0 if H0 is false and the probability of accepting H1 if H1 is true
d. the probability of rejecting H0 if H0 is true
In order to calculate power you must know _________.
a. alpha
b. N
c. P
d. the results of the experiment
e. all of these
f. alpha, N and P
Indicate whether the statement is true or false
An experiment with N = 18 is more powerful than an experiment with N = 17, all other things being the same.
a. true b. false
In an experiment, if the effect of the independent variable and alpha remain the same and N increases, _________.
a. power increases c. power remains the same
b. power decreases d. cannot be determined
In the sign test, if H0 is false, then Preal _________.
a. equals 0.05 c. equals 1 - 0.05
b. equals 0.50 d. does not equal 0.50
If H0 is false, the probability of making a correct decision is _________.
a. alpha c. power
b. 1 - alpha d. 1 power
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