Question 1

Which of the following is an example of a discrete variable?

Accepted Answer

A) The age of each student in a psychology class 
B) The gender of each student in a psychology class 
C) The amount of time to solve a problem 
D) The amount of weight gained for each freshman at a local college 
A) The age of each student in a psychology class 
B) The gender of each student in a psychology class 
C) The amount of time to solve a problem 
D) The amount of weight gained for each freshman at a local college

Question 2

What scale of measurement is being used when a teacher measures the number of correct answers on a quiz for each student?

Accepted Answer

A) Nominal 
B) Ordinal 
C) Interval 
D) Ratio 
A) Nominal 
B) Ordinal 
C) Interval 
D) Ratio

Question 3

In a correlational study,

Accepted Answer

A) 1 variable is measured and 2 groups are compared. 
B) 2 variables are measured and 2 groups are compared. 
C) 1 variable is measured and there is only 1 group of participants. 
D) 2 variables are measured and there is only 1 group of participants. 
A) 1 variable is measured and 2 groups are compared. 
B) 2 variables are measured and 2 groups are compared. 
C) 1 variable is measured and there is only 1 group of participants. 
D) 2 variables are measured and there is only 1 group of participants.

Question 4

A researcher uses an anonymous survey to investigate the television-viewing habits of American adolescents.The goal of the research is to determine the average number of hours each day that American adolescents spend watching television.The researcher is trying to determine a number that is an example of a _____.

Accepted Answer

A) parameter 
B) statistic 
C) population 
D) sample 
A) parameter 
B) statistic 
C) population 
D) sample

Question 5

For statistical purposes,it usually is not important to differentiate between which two scales of measurement?

Accepted Answer

A) Nominal and ordinal 
B) Ordinal and interval 
C) Interval and ratio 
D) Nominal and interval 
A) Nominal and ordinal 
B) Ordinal and interval 
C) Interval and ratio 
D) Nominal and interval

Question 6

If a researcher measures two individuals on an ordinal scale,it is impossible to determine how much difference exists between the two people.

Accepted Answer

A) True 
 B)False

Question 7

What is the first step to be performed in the following mathematical expression,ΣX2?

Accepted Answer

A) Square each score 
B) Add the scores 
C) Add the squared scores 
D) Square the sum of the scores 
A) Square each score 
B) Add the scores 
C) Add the squared scores 
D) Square the sum of the scores

Question 8

The first step in computing Σ(X + 1)is to add 1 point to each score.

Accepted Answer

A) True 
 B)False

Question 9

What is the final step to be performed when computing Σ(X - 2)2?

Accepted Answer

A) Square each value 
B) Subtract 2 points from each score 
C) Sum the squared values 
D) Subtract 22 from each X2 value 
A) Square each value 
B) Subtract 2 points from each score 
C) Sum the squared values 
D) Subtract 22 from each X2 value

Question 10

In an introductory theater class,the professor records each student's favorite movie from the previous year.The teacher is measuring a discrete variable.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is an example of a continuous variable?

Accepted Answer

A) The gender of each student in a psychology class 
B) The number of males in each class offered by the college 
C) The amount of time to solve a problem 
D) The number of children in a family 
A) The gender of each student in a psychology class 
B) The number of males in each class offered by the college 
C) The amount of time to solve a problem 
D) The number of children in a family

Question 12

A doctor is measuring children's heights to the nearest ½ inch and obtains scores such as 40.0,40.5,41.0,and so on.What are the real limits for a score of X = 42?

Accepted Answer

A) 41 and 43 
B) 41.5 and 42.5 
C) 41.75 and 42.25 
D) 41.25 and 42.75 
A) 41 and 43 
B) 41.5 and 42.5 
C) 41.75 and 42.25 
D) 41.25 and 42.75

Question 13

Determining the class standing (1st,2nd,and so on)for the graduating seniors at a high school would involve measurement on a(n)_____ scale of measurement.

Accepted Answer

A) nominal 
B) ordinal 
C) interval 
D) ratio 
A) nominal 
B) ordinal 
C) interval 
D) ratio

Question 14

Statistical techniques are classified into two major categories: descriptive and inferential.Describe the general purpose of each category.

Accepted Answer

The purpose of descriptive statistics is

Question 15

What is the final step to be performed in the mathematical expression,(ΣX)2?

Accepted Answer

A) Square each score 
B) Add the scores 
C) Add the squared scores 
D) Square the sum of the scores 
A) Square each score 
B) Add the scores 
C) Add the squared scores 
D) Square the sum of the scores

Question 16

What kind of measurement scale is necessary to conclude that one score is twice a big as another?

Accepted Answer

A) Ordinal 
B) Interval 
C) Ratio 
D) Interval or ratio 
A) Ordinal 
B) Interval 
C) Ratio 
D) Interval or ratio

Question 17

For an experiment comparing two methods of teaching social skills training to autistic children,the independent variable is _______ and the dependent variable is _______.

Accepted Answer

A) teaching methods; the autistic children 
B) the autistic children; the social skills that are learned 
C) the social skills that are learned; the autistic children 
D) teaching methods; the social skills that are learned 
A) teaching methods; the autistic children 
B) the autistic children; the social skills that are learned 
C) the social skills that are learned; the autistic children 
D) teaching methods; the social skills that are learned

Question 18

A researcher uses an anonymous survey to investigate the television-viewing habits of American adolescents.Based on the set of 356 surveys that were completed and returned,the researcher finds that these students spend an average of 3.1 hours each day watching television.For this study,the set of 356 students who returned surveys is an example of a _______.

Accepted Answer

A) parameter 
B) statistic 
C) population 
D) sample 
A) parameter 
B) statistic 
C) population 
D) sample

Question 19

What is the value of ΣX + 1 for the scores 1,0,2,4?

Accepted Answer

A) 8 
B) 10 
C) 11 
D) 14 
A) 8 
B) 10 
C) 11 
D) 14

Question 20

Using the average score to describe a sample is an example of inferential statistics.

Accepted Answer

A) True 
 B)False

Which of the following is an example of a discrete variable?

What scale of measurement is being used when a teacher measures the number of correct answers on a quiz for each student?

In a correlational study,

For statistical purposes,it usually is not important to differentiate between which two scales of measurement?

If a researcher measures two individuals on an ordinal scale,it is impossible to determine how much difference exists between the two people.

What is the first step to be performed in the following mathematical expression,ΣX²?

The first step in computing Σ(X + 1)is to add 1 point to each score.

What is the final step to be performed when computing Σ(X - 2)²?

In an introductory theater class,the professor records each student's favorite movie from the previous year.The teacher is measuring a discrete variable.

Which of the following is an example of a continuous variable?

A doctor is measuring children's heights to the nearest ½ inch and obtains scores such as 40.0,40.5,41.0,and so on.What are the real limits for a score of X = 42?

Determining the class standing (1^st,2^nd,and so on)for the graduating seniors at a high school would involve measurement on a(n)_____ scale of measurement.

Statistical techniques are classified into two major categories: descriptive and inferential.Describe the general purpose of each category.

What is the final step to be performed in the mathematical expression,(ΣX)²?

What kind of measurement scale is necessary to conclude that one score is twice a big as another?

For an experiment comparing two methods of teaching social skills training to autistic children,the independent variable is _ and the dependent variable is _.

What is the value of ΣX + 1 for the scores 1,0,2,4?

Using the average score to describe a sample is an example of inferential statistics.

Frequency Distributions

Measures of Central Tendency

Measures of Variability

Z-Scores

Probability

Probability and Samples:

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Anova

Correlation and Regression

Chi-Square Tests

Filters

Exam 1: Introduction to Statistics

Which of the following is an example of a discrete variable?

What scale of measurement is being used when a teacher measures the number of correct answers on a quiz for each student?

In a correlational study,

For statistical purposes,it usually is not important to differentiate between which two scales of measurement?

If a researcher measures two individuals on an ordinal scale,it is impossible to determine how much difference exists between the two people.

What is the first step to be performed in the following mathematical expression,ΣX2?

The first step in computing Σ(X + 1)is to add 1 point to each score.

What is the final step to be performed when computing Σ(X - 2)2?

In an introductory theater class,the professor records each student's favorite movie from the previous year.The teacher is measuring a discrete variable.

Which of the following is an example of a continuous variable?

A doctor is measuring children's heights to the nearest ½ inch and obtains scores such as 40.0,40.5,41.0,and so on.What are the real limits for a score of X = 42?

Determining the class standing (1st,2nd,and so on)for the graduating seniors at a high school would involve measurement on a(n)_____ scale of measurement.

Statistical techniques are classified into two major categories: descriptive and inferential.Describe the general purpose of each category.

What is the final step to be performed in the mathematical expression,(ΣX)2?

What kind of measurement scale is necessary to conclude that one score is twice a big as another?

For an experiment comparing two methods of teaching social skills training to autistic children,the independent variable is _______ and the dependent variable is _______.

What is the value of ΣX + 1 for the scores 1,0,2,4?

Using the average score to describe a sample is an example of inferential statistics.

Frequency Distributions

Measures of Central Tendency

Measures of Variability

Z-Scores

Probability

Probability and Samples:

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Anova

Correlation and Regression

Chi-Square Tests

Filters

What is the first step to be performed in the following mathematical expression,ΣX²?

What is the final step to be performed when computing Σ(X - 2)²?

Determining the class standing (1^st,2^nd,and so on)for the graduating seniors at a high school would involve measurement on a(n)_____ scale of measurement.

What is the final step to be performed in the mathematical expression,(ΣX)²?

For an experiment comparing two methods of teaching social skills training to autistic children,the independent variable is _ and the dependent variable is _.