Power is highest for the

The less stringent the significance level, the higher the power.
false
0.01 level
false
0.05 level
true
0.10 level
What increases power more:

The increase is greater for small sample sizes.
true
an increase in sample size from 10 to 20.
false
an increase in sample size from 20 to 30.
As sample size increases, power

Power increases quickly at first and then levels off.
true
increases quickly at first and then levels off.
false
increases linearly.
false
is unaffected
As sample size increases the Type I error rate

Sample size does not affect the Type I error rate.
false
increases.
false
decreases.
false
increases and then decreases.
Increasing the difference between the population mean and the hypothesized mean

Larer differences are easier to detect.
true
increases power.
false
decreases power.
Which is more powerful

One-tailed tests are more powerful as long as the hypothesized direction of the effect is correct.
true
one-tailed tests
false
two-tailed tests
The larger the standard deviation, the higher the power.

The larger the standard deviation, the lower the power.
false
True
true
False.
Which of the following is/are true?

true, false, true, true
true
Increasing sample size increases power.
false
Increasing sample size decreases the Type I error rate.
true
The smaller the difference between the hypothesized mean and the population mean, the lower the power.
true
A test at the 0.05 level has more power than a test at the 0.01 level.