Question 1

What kind of variable requires the use of real limits?

Accepted Answer

A) Independent 
B) Dependent 
C) Discrete 
D) Continuous

Question 2

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

Accepted Answer

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

Question 3

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 4

A researcher conducts an experiment to determine whether moderate doses of St.John's Wort have any effect of 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) Cannot answer without more information

Question 5

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

Question 6

The participants in a research study are classified as high,medium,or low in self-esteem.What measurement scale is being used to classify self-esteem?

Accepted Answer

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

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

A researcher interested in vocabulary development obtains a sample of 3-year-old children to participate in a research study.The average score for the group of children is an example of a parameter.

Accepted Answer

A) True 
 B)False

Question 9

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 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

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 (Σ)

Question 13

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

Accepted Answer

The answer of Statistical techniques are classified into two major...

Question 14

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

Question 15

What is the value of (ΣX)² for the scores 1,5,2?

Accepted Answer

A) 10 
B) 16 
C) 30 
D) 64

Question 16

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

Question 17

Recording the number of text messages you receive each day would be an example of measuring a discrete variable.

Accepted Answer

A) True 
 B)False

Question 18

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 19

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 20

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

Exam 1: Introduction to Statistics.

What kind of variable requires the use of real limits?

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

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

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

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

The participants in a research study are classified as high,medium,or low in self-esteem.What measurement scale is being used to classify self-esteem?

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

A researcher interested in vocabulary development obtains a sample of 3-year-old children to participate in a research study.The average score for the group of children is an example of a parameter.

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

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

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

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

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

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?

What is the value of (ΣX) ² for the scores 1,5,2?

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

Recording the number of text messages you receive each day would be an example of measuring a discrete variable.

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?

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

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