Question 1

After measuring two individuals,a researcher can say that Tom's score is 4 points higher than Bill's.The measurements must come from a(n)_______ scale.

Accepted Answer

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

Question 2

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  True

Question 3

The goal for an experiment is to demonstrate that changes in one variable are responsible for causing changes in a second variable.

Accepted Answer

A) True 
 B)False  True

Question 4

What is the value of Σ(X + 1)for the scores 1,0,1,4?

Accepted Answer

A)  4
B)  6
C)  7
D)  10

Question 5

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 6

A discrete variable must be measured on a nominal or an ordinal scale.

Accepted Answer

A) True 
 B)False

Question 7

For the following scores,Σ(X + 1)= 9.

Accepted Answer

A) True 
 B)False

Question 8

A recent study reports that students who just finished playing a prosocial video game were more likely to help others than students who had played a neutral or antisocial game.For this study,what is the independent variable?

Accepted Answer

A)  The students who were given the prosocial game
B)  The students who were given the neutral or antisocial game
C)  The kind of game given to the students
D)  The helping behavior of the students

Question 9

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 10

Organizing a set of scores in a table is an example of using _______.

Accepted Answer

A)  parameters
B)  statistics
C)  descriptive statistics
D)  inferential statistics

Question 11

Using the election results from a sample of n = 100 voters to predict the results for the entire state is an example of inferential statistics.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is done last in the order of operations?

Accepted Answer

A)  Squaring
B)  Multiplication
C)  Addition
D)  Summation ()

Question 13

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

Accepted Answer

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

Question 14

The average verbal SAT score for the entire class of entering freshmen is 530.However,if you select a sample of 20 freshmen and compute their average verbal SAT score you probably will not get exactly 530.What statistical concept is used to explain the natural difference that exists between a sample mean and the corresponding population mean?

Accepted Answer

A)  Statistical error
B)  Inferential error
C)  Sampling error
D)  Parametric error

Question 15

A researcher is interested in the eating behavior of rats and selects a group of 25 rats to be tested in a research study.The group of 25 rats is an example of a ______.

Accepted Answer

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

Question 16

Define the concept of "sampling error." Note: your definition should include the concepts of sample,population,statistic,and parameter.

Accepted Answer

The answer of Define the concept of "sampling error." Note:...

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

Question 18

What additional information is obtained by measuring two individuals on an ordinal scale compared to a nominal scale?

Accepted Answer

A)  Whether the measurements are the same or different
B)  The direction of the difference
C)  The size of the difference
D)  None of the other options is correct

Question 19

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

Question 20

For statistical purposes,there usually is not much reason to differentiate between interval and ratio scales.

Accepted Answer

A) True 
 B)False

Exam 1: Introduction to Statistics

After measuring two individuals,a researcher can say that Tom's score is 4 points higher than Bill's.The measurements must come from a(n) _______ scale.

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

The goal for an experiment is to demonstrate that changes in one variable are responsible for causing changes in a second variable.

What is the value of Σ(X + 1) for the scores 1,0,1,4?

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

A discrete variable must be measured on a nominal or an ordinal scale.

For the following scores,Σ(X + 1)= 9.

A recent study reports that students who just finished playing a prosocial video game were more likely to help others than students who had played a neutral or antisocial game.For this study,what is the independent variable?

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

Organizing a set of scores in a table is an example of using _______.

Using the election results from a sample of n = 100 voters to predict the results for the entire state is an example of inferential statistics.

Which of the following is done last in the order of operations?

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

A researcher is interested in the eating behavior of rats and selects a group of 25 rats to be tested in a research study.The group of 25 rats is an example of a ______.

Define the concept of "sampling error." Note: your definition should include the concepts of sample,population,statistic,and parameter.

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 _______.

What additional information is obtained by measuring two individuals on an ordinal scale compared to a nominal scale?

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.

For statistical purposes,there usually is not much reason to differentiate between interval and ratio scales.

Exam 1: Introduction to Statistics

After measuring two individuals,a researcher can say that Tom's score is 4 points higher than Bill's.The measurements must come from a(n) _______ scale.

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

The goal for an experiment is to demonstrate that changes in one variable are responsible for causing changes in a second variable.

What is the value of Σ(X + 1) for the scores 1,0,1,4?

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

A discrete variable must be measured on a nominal or an ordinal scale.

For the following scores,Σ(X + 1)= 9.

A recent study reports that students who just finished playing a prosocial video game were more likely to help others than students who had played a neutral or antisocial game.For this study,what is the independent variable?

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

Organizing a set of scores in a table is an example of using _______.

Using the election results from a sample of n = 100 voters to predict the results for the entire state is an example of inferential statistics.

Which of the following is done last in the order of operations?

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

A researcher is interested in the eating behavior of rats and selects a group of 25 rats to be tested in a research study.The group of 25 rats is an example of a ______.

Define the concept of "sampling error." Note: your definition should include the concepts of sample,population,statistic,and parameter.

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 _______.

What additional information is obtained by measuring two individuals on an ordinal scale compared to a nominal scale?

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.

For statistical purposes,there usually is not much reason to differentiate between interval and ratio scales.

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