Psych 301 Ch. 11 Practice Quiz

Front 1

If the independent variable has a real effect, the probability of rejecting Ho is

Back 1

power

Front 2

One can increase power by

Back 2

increasing N and increasing the effect of independent variable

Front 3

If the power of an experiment is .3400, the probability of retaining Ho when Ho is false is

Back 3

0.6600

Front 4

Which of the following P values represents the strongest effect?

Back 4

Pnull=.50
Preal=.70
Preal=.80
Preal=.10**

Front 5

If beta=.7500, what is the power of the experiment?

Back 5

.2500

Front 6

Which of the following represents the null hypothesis condition for a nondirectional H1?

Back 6

pnull=.50

Front 7

In the case of N=3, Preal=.90, alpha =.05 1 tail, using the sign test, the power is

Back 7

0

Front 8

Which of the following may be false?

Back 8

alpha+beta=1

Front 9

In a two-tailed test, which of the following would yield the same power as a size of effect represented by Preal=.90

Back 9

Preal=.10

Front 10

If Ho is false the prob. of making a correct decision is

Back 10

power

Front 11

Assume that you have conducted an experiment and the tail probability for the results you obtained was .0900 and alpha=.05, you can conclude

Back 11

you were unable to detect an effect of the IV with your experiment (b/c we're retaining the null)

Front 12

Truth demands that scientists set

Back 12

not necessarily alpha=.01 or .05, but use their best judgment

Front 13

In the sign test, if Ho is false, then Preal

Back 13

does not equal .50

If Ho is False, Preal CAN'T be .50, it can never be .50

Front 14

In an experiment, if the effect of the IV and alpha remain the same and N increases

Back 14

power increases

Front 15

In an experiment with N=14 and Preal =.10, what is the power using alpha=.05 2 tail

Back 15

.8417

Front 16

In the same experiment as 15, what is the power using alpha=.01 2 tail

Back 16

.5847

Front 17

An experiment with N=18 is more powerful than an experiment N=17, all other things being the same

Back 17

true

Front 18

In order to calculate power, you must know

Back 18

alpha, N, P

Front 19

In an experiment with N=6, Preal =.15, what is the power using alpha =.01 2 tail

Back 19

0