Question 1

A researcher is interested in the average income for registered voters in the United States.The entire group of registered voters is an example of a population.​

Accepted Answer

A) True 
 B)False  True

Question 2

A researcher conducts an experiment to determine whether moderate doses of St.John's wort have any effect on memory for college students.For this study,what is the independent variable?​

Accepted Answer

A) ​The amount of St. John's wort given to each participant 
B) ​The memory score for each participant 
C) ​The group of college students 
D) ​Whether or not they are full-time students 
A) ​The amount of St. John's wort given to each participant 
B) ​The memory score for each participant 
C) ​The group of college students 
D) ​Whether or not they are full-time students A

Question 3

You are instructed to subtract four points from each score and find the sum of the resulting values.How would this set of instructions be expressed in summation notation?​

Accepted Answer

A) ​ΣX - 4 
B) ​Σ (X - 4) 
C) ​4 - ΣX 
D) ​Σ(4 - X) 
A) ​ΣX - 4 
B) ​Σ (X - 4) 
C) ​4 - ΣX 
D) ​Σ(4 - X) B

Question 4

For the following scores,ΣX2 = 35.Scores: 1,3,5​

Accepted Answer

A) True 
 B)False

Question 5

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 6

A correlational study typically uses only one group of participants but measures two different variables (two scores)for each individual.​

Accepted Answer

A) True 
 B)False

Question 7

For the following scores,Σ(X + 1)= 9.Scores: 1,3,0,1​

Accepted Answer

A) True 
 B)False

Question 8

What is the value of (ΣX)2 for the following scores?​ Scores: 1,0,2,4

Accepted Answer

A) ​14 
B) ​21 
C) ​28 
D) ​49 
A) ​14 
B) ​21 
C) ​28 
D) ​49

Question 9

What is the value of ΣX + 1 for the following scores?​ Scores: 1,6,3

Accepted Answer

A) ​10 
B) ​11 
C) ​13 
D) ​16 
A) ​10 
B) ​11 
C) ​13 
D) ​16

Question 10

What is the value of Σ(X + 1)for the following scores?​ Scores: 2,4,7

Accepted Answer

A) ​10 
B) ​11 
C) ​13 
D) ​16 
A) ​10 
B) ​11 
C) ​13 
D) ​16

Question 11

For the following scores,Σ(X + 1)2 = 81.Scores: 1,3,0,1​

Accepted Answer

A) True 
 B)False

Question 12

A recent report concluded that college graduates have higher life-satisfaction scores than individuals who do not receive college degrees.For this study,graduating versus not graduating is an example of a quasi-independent variable.

Accepted Answer

A) True 
 B)False

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

To determine how much difference there is between two individuals,you must use either an interval or a ratio scale of measurement.​

Accepted Answer

A) True 
 B)False

Question 15

The first step in computing Σ(X + 1)is to sum the scores.​

Accepted Answer

A) True 
 B)False

Question 16

In a correlational study,____.​

Accepted Answer

A) ​one variable is measured and two groups are compared 
B) ​two variables are measured and two groups are compared 
C) ​one variable is measured and there is only one group of participants 
D) ​two variables are measured and there is only one group of participants 
A) ​one variable is measured and two groups are compared 
B) ​two variables are measured and two groups are compared 
C) ​one variable is measured and there is only one group of participants 
D) ​two variables are measured and there is only one group of participants

Question 17

A researcher records the change in weight (gain or lost)during the first semester of college for each individual in a group of 25 freshmen,and calculates the average change in weight.The average is an example of a ____.​

Accepted Answer

A) ​parameter 
B) ​statistic 
C) ​variable 
D) ​constant 
A) ​parameter 
B) ​statistic 
C) ​variable 
D) ​constant

Question 18

Classifying people into two groups on the basis of gender is an example of measurement on an ordinal scale.​

Accepted Answer

A) True 
 B)False

Question 19

A correlational study is used to examine the relationship between two variables but cannot determine whether it is a cause-and-effect relationship.​

Accepted Answer

A) True 
 B)False

Question 20

For the following scores,ΣX2 = 49.Scores: 1,4,2,0​

Accepted Answer

A) True 
 B)False

A researcher is interested in the average income for registered voters in the United States.The entire group of registered voters is an example of a population.

A researcher conducts an experiment to determine whether moderate doses of St.John's wort have any effect on memory for college students.For this study,what is the independent variable?

You are instructed to subtract four points from each score and find the sum of the resulting values.How would this set of instructions be expressed in summation notation?

For the following scores,ΣX² = 35.Scores: 1,3,5

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

A correlational study typically uses only one group of participants but measures two different variables (two scores)for each individual.

For the following scores,Σ(X + 1)= 9.Scores: 1,3,0,1

What is the value of (ΣX)2 for the following scores? Scores: 1,0,2,4

What is the value of ΣX + 1 for the following scores? Scores: 1,6,3

What is the value of Σ(X + 1)for the following scores? Scores: 2,4,7

For the following scores,Σ(X + 1)² = 81.Scores: 1,3,0,1

A recent report concluded that college graduates have higher life-satisfaction scores than individuals who do not receive college degrees.For this study,graduating versus not graduating is an example of a quasi-independent variable.

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.

To determine how much difference there is between two individuals,you must use either an interval or a ratio scale of measurement.

The first step in computing Σ(X + 1)is to sum the scores.

In a correlational study,____.

A researcher records the change in weight (gain or lost)during the first semester of college for each individual in a group of 25 freshmen,and calculates the average change in weight.The average is an example of a ____.

Classifying people into two groups on the basis of gender is an example of measurement on an ordinal scale.

A correlational study is used to examine the relationship between two variables but cannot determine whether it is a cause-and-effect relationship.

For the following scores,ΣX² = 49.Scores: 1,4,2,0

Frequency Distributions

Central Tendency

Variability

Z-Scores: Location of Scores and Standardized Distributions

Probability

Probability and Samples: the Distribution of Sample Means

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 Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

The Binomial Test

Filters

Exam 1: Introduction to Statistics

A researcher is interested in the average income for registered voters in the United States.The entire group of registered voters is an example of a population.​

A researcher conducts an experiment to determine whether moderate doses of St.John's wort have any effect on memory for college students.For this study,what is the independent variable?​

You are instructed to subtract four points from each score and find the sum of the resulting values.How would this set of instructions be expressed in summation notation?​

For the following scores,ΣX2 = 35.Scores: 1,3,5​

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

A correlational study typically uses only one group of participants but measures two different variables (two scores)for each individual.​

For the following scores,Σ(X + 1)= 9.Scores: 1,3,0,1​

What is the value of (ΣX)2 for the following scores?​ Scores: 1,0,2,4

What is the value of ΣX + 1 for the following scores?​ Scores: 1,6,3

What is the value of Σ(X + 1)for the following scores?​ Scores: 2,4,7

For the following scores,Σ(X + 1)2 = 81.Scores: 1,3,0,1​

A recent report concluded that college graduates have higher life-satisfaction scores than individuals who do not receive college degrees.For this study,graduating versus not graduating is an example of a quasi-independent variable.

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.​

To determine how much difference there is between two individuals,you must use either an interval or a ratio scale of measurement.​

The first step in computing Σ(X + 1)is to sum the scores.​

In a correlational study,____.​

A researcher records the change in weight (gain or lost)during the first semester of college for each individual in a group of 25 freshmen,and calculates the average change in weight.The average is an example of a ____.​

Classifying people into two groups on the basis of gender is an example of measurement on an ordinal scale.​

A correlational study is used to examine the relationship between two variables but cannot determine whether it is a cause-and-effect relationship.​

For the following scores,ΣX2 = 49.Scores: 1,4,2,0​

Frequency Distributions

Central Tendency

Variability

Z-Scores: Location of Scores and Standardized Distributions

Probability

Probability and Samples: the Distribution of Sample Means

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 Analysis of Variance Anova

Two-Factor Analysis of Variance Independent Measures

Correlation

Introduction to Regression

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

The Binomial Test

Filters

A researcher is interested in the average income for registered voters in the United States.The entire group of registered voters is an example of a population.

A researcher conducts an experiment to determine whether moderate doses of St.John's wort have any effect on memory for college students.For this study,what is the independent variable?

You are instructed to subtract four points from each score and find the sum of the resulting values.How would this set of instructions be expressed in summation notation?

For the following scores,ΣX² = 35.Scores: 1,3,5

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

A correlational study typically uses only one group of participants but measures two different variables (two scores)for each individual.

For the following scores,Σ(X + 1)= 9.Scores: 1,3,0,1

What is the value of (ΣX)2 for the following scores? Scores: 1,0,2,4

What is the value of ΣX + 1 for the following scores? Scores: 1,6,3

What is the value of Σ(X + 1)for the following scores? Scores: 2,4,7

For the following scores,Σ(X + 1)² = 81.Scores: 1,3,0,1

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.

To determine how much difference there is between two individuals,you must use either an interval or a ratio scale of measurement.

The first step in computing Σ(X + 1)is to sum the scores.

In a correlational study,____.

A researcher records the change in weight (gain or lost)during the first semester of college for each individual in a group of 25 freshmen,and calculates the average change in weight.The average is an example of a ____.

Classifying people into two groups on the basis of gender is an example of measurement on an ordinal scale.

A correlational study is used to examine the relationship between two variables but cannot determine whether it is a cause-and-effect relationship.

For the following scores,ΣX² = 49.Scores: 1,4,2,0