chapter 11

Question 1

What is Power

Answer 1

• The ability to detect an effect when one is present
• Probability of rejecting the null

Question 2

A priori uses:

Answer 2

• before
• determines sample size necessary to detect an effect

Question 3

A posterior uses:

Answer 3

• after
• determining whether sample size and research design were adequate to detect an effect

Question 4

Power and Beta relationship

Answer 4

Power + Beta = 1

Question 5

The effect that Effect Size has on power

Answer 5

The larger the effect size, the higher the power.

Question 6

If we chose a value of α very near ZERO, β will typically be very close to one and the test will have very ________

Answer 6

low power

Question 7

If we were to chose a value of α near one, β would be close to zero, and the test would have very ________

Answer 7

high power