Question 1

In the sign test, if H 0 is false, then P real _________.

Accepted Answer

A)  equals 0.05 
B)  equals 0.50 
C)  equals 1 - 0.05 
D)  does not equal 0.50 
A)  equals 0.05 
B)  equals 0.50 
C)  equals 1 - 0.05 
D)  does not equal 0.50

Question 2

Assume you have N = 15, a = 0.051 tail, and applied the sign test to the data.

Accepted Answer

Question 3

Power is defined as ______.

Accepted Answer

A)  the probability of rejecting H 0 if H 0 is false 
B)  the probability of accepting H 1 if H 1 is true 
C)  the probability of rejecting H 0 if H 0 is false and the probability of accepting H 1 if H 1 is true 
D)  the probability of rejecting H 0 if H 0 is true 
A)  the probability of rejecting H 0 if H 0 is false 
B)  the probability of accepting H 1 if H 1 is true 
C)  the probability of rejecting H 0 if H 0 is false and the probability of accepting H 1 if H 1 is true 
D)  the probability of rejecting H 0 if H 0 is true

Question 4

If one conducts an experiment and ends up retaining H 0 , it is probably because the experiment was not powerful enough.

Accepted Answer

A) True 
 B)False

Question 5

In an experiment the calculated power to detect an effect is .4600. What is the value for beta?

Accepted Answer

In the context of hypothesis testing, po

Question 6

In an experiment where we retain H 0 , one cannot be certain if it was because H 0 was true or that the experiment was not powerful enough to detect an effect by the independent variable.

Accepted Answer

A) True 
 B)False

Question 7

Beta is the probability of retaining H 0 when H 0 is false.

Accepted Answer

A) True 
 B)False

Question 8

In an experiment with N = 6 and P real = 0.15, what is the power using a = 0.012 tail?

Accepted Answer

A)  1.0000 
B)  0.5000 
C)  0.0000 
D)  0.3771 
A)  1.0000 
B)  0.5000 
C)  0.0000 
D)  0.3771

Question 9

Define P real and P null.

Accepted Answer

The terms "P " and "P " appear to be a s

Question 10

A power analysis is useful when the results of an experiment fail to reach significance.

Accepted Answer

A) True 
 B)False

Question 11

In an experiment with N = 14 and P real = 0.10, what is the power using a = 0.052 tail?

Accepted Answer

A)  0.8417 
B)  0.0132 
C)  0.0000 
D)  0.0500 
A)  0.8417 
B)  0.0132 
C)  0.0000 
D)  0.0500

Question 12

Increasing N affects the magnitude of the effect of the independent variable.

Accepted Answer

A) True 
 B)False

Question 13

Power is the probability of making a correct decision when H 0 is true.

Accepted Answer

A) True 
 B)False

Question 14

P null is defined as _________.

Accepted Answer

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 H 1 
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 H 1 
D)  the probability of getting a plus with any subject in the sample of the experiment when the independent variable has no effect. 
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 H 1 
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 H 1 
D)  the probability of getting a plus with any subject in the sample of the experiment when the independent variable has no effect.

Question 15

You can only compute power when ________.

Accepted Answer

A)  alpha > 0.05 
B)  H 1 is given 
C)  Beta > 0.05 
D)  1 - power = 0.05 
A)  alpha > 0.05 
B)  H 1 is given 
C)  Beta > 0.05 
D)  1 - power = 0.05

Question 16

It is impossible for an experiment to have power equal to zero.

Accepted Answer

A) True 
 B)False

Question 17

Increasing N , making a more stringent, and increasing the effect of the independent variable, all increase power.

Accepted Answer

A) True 
 B)False

Question 18

Define real effect.

Accepted Answer

The term "real effect" can be interprete

Question 19

A professor thinks that a certain movie is fun and exciting for students. He selects heart rate (HR) measured before and after the movie as the dependent variable for a study on 12 students. He figures if the students are having fun and are excited, the heart rate will be higher right after the movie. The following data have been obtained.

Accepted Answer

The answer of A professor thinks that a certain movie...

Question 20

Power is a measure of the sensitivity of an experiment to detect the real effects of the independent variable, if there are any.

Accepted Answer

A) True 
 B)False

In the sign test, if H ₀ is false, then P _real _________.

Assume you have N = 15, a = 0.05_{1 tail}, and applied the sign test to the data.

Power is defined as ______.

If one conducts an experiment and ends up retaining H ₀ , it is probably because the experiment was not powerful enough.

In an experiment the calculated power to detect an effect is .4600. What is the value for beta?

In an experiment where we retain H ₀ , one cannot be certain if it was because H ₀ was true or that the experiment was not powerful enough to detect an effect by the independent variable.

Beta is the probability of retaining H ₀ when H ₀ is false.

In an experiment with N = 6 and P _real = 0.15, what is the power using a = 0.01_{2 tail}?

Define P _real and P _null.

A power analysis is useful when the results of an experiment fail to reach significance.

In an experiment with N = 14 and P _real = 0.10, what is the power using a = 0.05_{2 tail}?

Increasing N affects the magnitude of the effect of the independent variable.

Power is the probability of making a correct decision when H ₀ is true.

P _null is defined as _________.

You can only compute power when ________.

It is impossible for an experiment to have power equal to zero.

Increasing N , making a more stringent, and increasing the effect of the independent variable, all increase power.

Define real effect.

Power is a measure of the sensitivity of an experiment to detect the real effects of the independent variable, if there are any.

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

In the sign test, if H 0 is false, then P real _________.

Assume you have N = 15, a = 0.051 tail, and applied the sign test to the data.

Power is defined as ______.

If one conducts an experiment and ends up retaining H 0 , it is probably because the experiment was not powerful enough.

In an experiment the calculated power to detect an effect is .4600. What is the value for beta?

In an experiment where we retain H 0 , one cannot be certain if it was because H 0 was true or that the experiment was not powerful enough to detect an effect by the independent variable.

Beta is the probability of retaining H 0 when H 0 is false.

In an experiment with N = 6 and P real = 0.15, what is the power using a = 0.012 tail?

Define P real and P null.

A power analysis is useful when the results of an experiment fail to reach significance.

In an experiment with N = 14 and P real = 0.10, what is the power using a = 0.052 tail?

Increasing N affects the magnitude of the effect of the independent variable.

Power is the probability of making a correct decision when H 0 is true.

P null is defined as _________.

You can only compute power when ________.

It is impossible for an experiment to have power equal to zero.

Increasing N , making a more stringent, and increasing the effect of the independent variable, all increase power.

Define real effect.

Power is a measure of the sensitivity of an experiment to detect the real effects of the independent variable, if there are any.

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 sign test, if H ₀ is false, then P _real _________.

Assume you have N = 15, a = 0.05_{1 tail}, and applied the sign test to the data.

If one conducts an experiment and ends up retaining H ₀ , it is probably because the experiment was not powerful enough.

In an experiment where we retain H ₀ , one cannot be certain if it was because H ₀ was true or that the experiment was not powerful enough to detect an effect by the independent variable.

Beta is the probability of retaining H ₀ when H ₀ is false.

In an experiment with N = 6 and P _real = 0.15, what is the power using a = 0.01_{2 tail}?

Define P _real and P _null.

In an experiment with N = 14 and P _real = 0.10, what is the power using a = 0.05_{2 tail}?

Power is the probability of making a correct decision when H ₀ is true.

P _null is defined as _________.