Question 1

Alpha + beta = 1.

Accepted Answer

A) True 
 B)False

Question 2

Other factors held constant, a one-tailed test is more powerful than a two-tailed test.

Accepted Answer

A) True 
 B)False

Question 3

An experiment with a = 0.05 is more powerful than one where a = 0.01, other factors held constant.

Accepted Answer

A) True 
 B)False

Question 4

Assume you have done an experiment and used the sign test to analyze the results. N = 14.

Accepted Answer

The answer of Assume you have done an experiment and...

Question 5

Truth demands that scientists set _________.

Accepted Answer

A)  alpha equal to 0.05 
B)  alpha equal to 0.01 
C)  a or b 
D)  not necessarily a = 0.01 or 0.05, but use their best judgment 
A)  alpha equal to 0.05 
B)  alpha equal to 0.01 
C)  a or b 
D)  not necessarily a = 0.01 or 0.05, but use their best judgment

Question 6

In the case of N = 3, P real = 0.90, a = 0.051 tail, using the sign test, the power is _________.

Accepted Answer

A)  1.0000 
B)  0.1250 
C)  0.8750 
D)  0.0000 
A)  1.0000 
B)  0.1250 
C)  0.8750 
D)  0.0000

Question 7

"Correct Decision" is defined as _________.

Accepted Answer

A)  retaining H 0 when it is true 
B)  rejecting H 0 when it is false 
C)  rejecting H 1 when it is false 
D)  accepting H 1 when it is true 
E)  all of these 
A)  retaining H 0 when it is true 
B)  rejecting H 0 when it is false 
C)  rejecting H 1 when it is false 
D)  accepting H 1 when it is true 
E)  all of these

Question 8

Power and beta are inversely related.

Accepted Answer

A) True 
 B)False

Question 9

Why is it important to know the power of an experiment?

Accepted Answer

Knowing the power of an experiment is cr

Question 10

If H 0 is true, then the probability of rejecting H 0 is limited by _________.

Accepted Answer

A)  Power 
B)  1 - power 
C)  alpha 
D)  beta 
A)  Power 
B)  1 - power 
C)  alpha 
D)  beta

Question 11

An experiment where P real = 0.10 is less likely to allow rejection of H 0 if H 0 is false than one where P real = 0.80.

Accepted Answer

A) True 
 B)False

Question 12

If the null hypothesis is false, the probability of making a correct decision is given by _________.

Accepted Answer

A)  alpha 
B)  beta 
C)  1 - alpha 
D)  power 
A)  alpha 
B)  beta 
C)  1 - alpha 
D)  power

Question 13

Power equals _________

Accepted Answer

A)  alpha + beta 
B)  1 - beta 
C)  1 - alpha 
D)  alpha - beta 
A)  alpha + beta 
B)  1 - beta 
C)  1 - alpha 
D)  alpha - beta

Question 14

Power varies from - 1 to +1.

Accepted Answer

A) True 
 B)False

Question 15

In a two-tailed test, which of the following would yield the same power as a size of effect represented by P real = 0.90?

Accepted Answer

A)  P real = 1.00 
B)  P real = 0.10 
C)  P real = 0.80 
D)  none of these 
A)  P real = 1.00 
B)  P real = 0.10 
C)  P real = 0.80 
D)  none of these

Question 16

A good experiment is one where both a and b are low.

Accepted Answer

A) True 
 B)False

Question 17

If H 0 is true, as the power of the experiment increases, the probability of rejecting H 0 increases.

Accepted Answer

A) True 
 B)False

Question 18

With the effect of the independent variable and N held constant, as a gets more stringent _________.

Accepted Answer

A)  power increases 
B)  power stays the same 
C)  power decreases 
D)  beta decreases 
A)  power increases 
B)  power stays the same 
C)  power decreases 
D)  beta decreases

Question 19

You are considering testing a new drug that is supposed to facilitate learning in mentally retarded children. Because there is relatively little known about the drug, you plan to use a nondirectional alternative hypothesis. Since your resources are limited, you can test only 15 subjects. The subjects will be run in a repeated measures design and the data will be analyzed with the sign test, using a = 0.052 tail. What is the probability of a Type II error?

Accepted Answer

A)  0.7032 
B)  0.7031 
C)  0.9824 
D)  0.9648 
A)  0.7032 
B)  0.7031 
C)  0.9824 
D)  0.9648

Question 20

In question 18, what is the probability of making a Type II error?

Accepted Answer

To provide an answer to the question "In

Alpha + beta = 1.

Other factors held constant, a one-tailed test is more powerful than a two-tailed test.

An experiment with a = 0.05 is more powerful than one where a = 0.01, other factors held constant.

Assume you have done an experiment and used the sign test to analyze the results. N = 14.

Truth demands that scientists set _________.

In the case of N = 3, P _real = 0.90, a = 0.05_{1 tail}, using the sign test, the power is _________.

"Correct Decision" is defined as _________.

Power and beta are inversely related.

Why is it important to know the power of an experiment?

If H ₀ is true, then the probability of rejecting H ₀ is limited by _________.

An experiment where P _real = 0.10 is less likely to allow rejection of H ₀ if H ₀ is false than one where P _real = 0.80.

If the null hypothesis is false, the probability of making a correct decision is given by _________.

Power equals _________

Power varies from - 1 to +1.

In a two-tailed test, which of the following would yield the same power as a size of effect represented by P _real = 0.90?

A good experiment is one where both a and b are low.

If H ₀ is true, as the power of the experiment increases, the probability of rejecting H ₀ increases.

With the effect of the independent variable and N held constant, as a gets more stringent _________.

In question 18, what is the probability of making a Type II error?

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

Exam 11: Power

Alpha + beta = 1.

Other factors held constant, a one-tailed test is more powerful than a two-tailed test.

An experiment with a = 0.05 is more powerful than one where a = 0.01, other factors held constant.

Assume you have done an experiment and used the sign test to analyze the results. N = 14.

Truth demands that scientists set _________.

In the case of N = 3, P real = 0.90, a = 0.051 tail, using the sign test, the power is _________.

"Correct Decision" is defined as _________.

Power and beta are inversely related.

Why is it important to know the power of an experiment?

If H 0 is true, then the probability of rejecting H 0 is limited by _________.

An experiment where P real = 0.10 is less likely to allow rejection of H 0 if H 0 is false than one where P real = 0.80.

If the null hypothesis is false, the probability of making a correct decision is given by _________.

Power equals _________

Power varies from - 1 to +1.

In a two-tailed test, which of the following would yield the same power as a size of effect represented by P real = 0.90?

A good experiment is one where both a and b are low.

If H 0 is true, as the power of the experiment increases, the probability of rejecting H 0 increases.

With the effect of the independent variable and N held constant, as a gets more stringent _________.

In question 18, what is the probability of making a Type II error?

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

In the case of N = 3, P _real = 0.90, a = 0.05_{1 tail}, using the sign test, the power is _________.

If H ₀ is true, then the probability of rejecting H ₀ is limited by _________.

An experiment where P _real = 0.10 is less likely to allow rejection of H ₀ if H ₀ is false than one where P _real = 0.80.

In a two-tailed test, which of the following would yield the same power as a size of effect represented by P _real = 0.90?

If H ₀ is true, as the power of the experiment increases, the probability of rejecting H ₀ increases.