Question 1

Statisticians may determine the effects of violating assumptions by

Accepted Answer

A) using mathematical logic 
B) conducting a Monte Carlo study 
C) both of these 
D) none of these 
A) using mathematical logic 
B) conducting a Monte Carlo study 
C) both of these 
D) none of these C

Question 2

A method that may minimizes the possibility of confounding due to individual differences is ____.

Accepted Answer

A) random assignment to treatment groups 
B) random selection from the population 
C) representative selection 
A) random assignment to treatment groups 
B) random selection from the population 
C) representative selection A

Question 3

When an experimental research strategy is used,inferences of causation can be made only when confounded variables are controlled.

Accepted Answer

A) True 
 B)False  True

Question 4

Which of the following applies to a disturbance variable?

Accepted Answer

A) it is unrelated to the independent variable. 
B) it influences the dependent variable. 
C) it increases sampling error. 
D) all of these 
A) it is unrelated to the independent variable. 
B) it influences the dependent variable. 
C) it increases sampling error. 
D) all of these

Question 5

What is the major disadvantage of holding a variable constant?

Accepted Answer

The major disadvantage of holding a vari

Question 6

Dr.Len wants to determine whether or not dextrin causes people to lose weight.He gives 10 subjects dextrin and 10 subjects a placebo.He measures their weight every day (since weight seems to fluctuate daily)until the experiment is discontinued (after 4 weeks).In Dr.Len's study what are some disadvantages with using this particular design?

Accepted Answer

A) significant amount of variance in subjects occurs 
B) carry-over effects 
C) a large subject pool is needed 
D) Both a & c 
E) All of these 
A) significant amount of variance in subjects occurs 
B) carry-over effects 
C) a large subject pool is needed 
D) Both a & c 
E) All of these

Question 7

Comparing how well males and females perform on a video game that simulates landing a space shuttle is _____.

Accepted Answer

A) correlational 
B) experimental 
A) correlational 
B) experimental

Question 8

A cross-sectional design is the same as a longitudinal but the latter takes longer.

Accepted Answer

A) True 
 B)False

Question 9

_____ refers to the extent to which conclusions drawn on the basis of a statistical test (for example,rejection of the null hypothesis)are unaffected by violations of the assumptions underlying the test.

Accepted Answer

A) validity 
B) reliability 
C) robustness 
D) none of these 
A) validity 
B) reliability 
C) robustness 
D) none of these

Question 10

Describe how random assignment helps to control for alternative explanations.

Accepted Answer

If the condition in which a given person

Question 11

The _____ design can offer considerably more experimental control over individual difference variables than the _____ design.

Accepted Answer

A) observational;experimental 
B) factorial;experimental 
C) between-subjects;within-subjects 
D) within-subjects;between-subjects 
A) observational;experimental 
B) factorial;experimental 
C) between-subjects;within-subjects 
D) within-subjects;between-subjects

Question 12

Since experimental independent variables will always be confounded with all other variables that are naturally related to them,causal inferences are typically not possible when an experimental research strategy is used.

Accepted Answer

A) True 
 B)False

Question 13

An observational study manipulates an independent variable.

Accepted Answer

A) True 
 B)False

Question 14

A confounding variable is one that is related to the independent variable (the presumed cause)and that affects the dependent variable (the presumed effect),rendering a relational inference between the independent variable and the dependent variable ambiguous.

Accepted Answer

A) True 
 B)False

Question 15

Parametric statistical test assumes that there is homogeneity of variance in both groups.

Accepted Answer

A) True 
 B)False

Question 16

A matched-subjects design often has the power of a within-subjects design while avoiding the problem(s)of ___.

Accepted Answer

A) carry-over effects 
B) subject economy 
C) individual differences 
D) all of these 
A) carry-over effects 
B) subject economy 
C) individual differences 
D) all of these

Question 17

The major disadvantage of holding a variable constant is that it may restrict the generalizability of the results.

Accepted Answer

A) True 
 B)False

Question 18

Statisticians can determine the effects of violating assumptions by using _____ or performing _____.

Accepted Answer

A) mathematical logic;Monte Carlo studies 
B) observational designs;experimental designs 
C) Monte Carlo studies;one-sample t tests 
D) violation estimates;factorial designs 
A) mathematical logic;Monte Carlo studies 
B) observational designs;experimental designs 
C) Monte Carlo studies;one-sample t tests 
D) violation estimates;factorial designs

Question 19

A common strategy to control confounding variables is (are):

Accepted Answer

A) holding a variable constant. 
B) matching. 
C) random assignment to experimental groups. 
D) all of these 
A) holding a variable constant. 
B) matching. 
C) random assignment to experimental groups. 
D) all of these

Question 20

Experimental strategies automatically control for confounding variables.

Accepted Answer

A) True 
 B)False

Statisticians may determine the effects of violating assumptions by

A method that may minimizes the possibility of confounding due to individual differences is ____.

When an experimental research strategy is used,inferences of causation can be made only when confounded variables are controlled.

Which of the following applies to a disturbance variable?

What is the major disadvantage of holding a variable constant?

Comparing how well males and females perform on a video game that simulates landing a space shuttle is _____.

A cross-sectional design is the same as a longitudinal but the latter takes longer.

_____ refers to the extent to which conclusions drawn on the basis of a statistical test (for example,rejection of the null hypothesis)are unaffected by violations of the assumptions underlying the test.

Describe how random assignment helps to control for alternative explanations.

The _ design can offer considerably more experimental control over individual difference variables than the _ design.

Since experimental independent variables will always be confounded with all other variables that are naturally related to them,causal inferences are typically not possible when an experimental research strategy is used.

An observational study manipulates an independent variable.

A confounding variable is one that is related to the independent variable (the presumed cause)and that affects the dependent variable (the presumed effect),rendering a relational inference between the independent variable and the dependent variable ambiguous.

Parametric statistical test assumes that there is homogeneity of variance in both groups.

A matched-subjects design often has the power of a within-subjects design while avoiding the problem(s)of ___.

The major disadvantage of holding a variable constant is that it may restrict the generalizability of the results.

Statisticians can determine the effects of violating assumptions by using _ or performing _.

A common strategy to control confounding variables is (are):

Experimental strategies automatically control for confounding variables.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Independent Groups T-Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

Exam 9: Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Statisticians may determine the effects of violating assumptions by

A method that may minimizes the possibility of confounding due to individual differences is ____.

When an experimental research strategy is used,inferences of causation can be made only when confounded variables are controlled.

Which of the following applies to a disturbance variable?

What is the major disadvantage of holding a variable constant?

Comparing how well males and females perform on a video game that simulates landing a space shuttle is _____.

A cross-sectional design is the same as a longitudinal but the latter takes longer.

_____ refers to the extent to which conclusions drawn on the basis of a statistical test (for example,rejection of the null hypothesis)are unaffected by violations of the assumptions underlying the test.

Describe how random assignment helps to control for alternative explanations.

The _____ design can offer considerably more experimental control over individual difference variables than the _____ design.

Since experimental independent variables will always be confounded with all other variables that are naturally related to them,causal inferences are typically not possible when an experimental research strategy is used.

An observational study manipulates an independent variable.

A confounding variable is one that is related to the independent variable (the presumed cause)and that affects the dependent variable (the presumed effect),rendering a relational inference between the independent variable and the dependent variable ambiguous.

Parametric statistical test assumes that there is homogeneity of variance in both groups.

A matched-subjects design often has the power of a within-subjects design while avoiding the problem(s)of ___.

The major disadvantage of holding a variable constant is that it may restrict the generalizability of the results.

Statisticians can determine the effects of violating assumptions by using _____ or performing _____.

A common strategy to control confounding variables is (are):

Experimental strategies automatically control for confounding variables.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Independent Groups T-Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

The _ design can offer considerably more experimental control over individual difference variables than the _ design.

Statisticians can determine the effects of violating assumptions by using _ or performing _.