Question 1

If you want to determine the relationship between two or more categorical variables, what should you do?

Accepted Answer

A)  Calculate the Pearson Product Moment Correlation Coefficient 
B)  Construct a contingency table 
C)  Conduct a regression analysis 
D)  Conduct an analysis of variance 
A)  Calculate the Pearson Product Moment Correlation Coefficient 
B)  Construct a contingency table 
C)  Conduct a regression analysis 
D)  Conduct an analysis of variance

Question 2

The purpose of descriptive statistics is to:

Accepted Answer

A)  Make inferences about a population from a sample 
B)  Test hypotheses 
C)  Make interval estimates 
D)  Summarize and explain a set of data 
A)  Make inferences about a population from a sample 
B)  Test hypotheses 
C)  Make interval estimates 
D)  Summarize and explain a set of data

Question 3

Measures of variability indicate:

Accepted Answer

A)  Where the modal score lies 
B)  The median score value 
C)  The degree of skewness in the distribution 
D)  How spread out scores are in a distribution 
A)  Where the modal score lies 
B)  The median score value 
C)  The degree of skewness in the distribution 
D)  How spread out scores are in a distribution

Question 4

Examine the following table. A researcher is interested in whether learning from instruction that includes video will be more likely to transfer (be applicable in new contexts) than learning that takes place with still photos or a written document. Which statement below is true?

Accepted Answer

A)  The video group was less likely to transfer than the picture group 
B)  The picture group had the largest number of participants show transfer 
C)  The picture group was more likely to transfer than the written text group 
D)  All groups were equally likely to show transfer of learning 
A)  The video group was less likely to transfer than the picture group 
B)  The picture group had the largest number of participants show transfer 
C)  The picture group was more likely to transfer than the written text group 
D)  All groups were equally likely to show transfer of learning

Question 5

A z score transforms a raw score into:

Accepted Answer

A)  Percent correct 
B)  A ratio of right to wrong answers 
C)  A range 
D)  Standard deviation units 
A)  Percent correct 
B)  A ratio of right to wrong answers 
C)  A range 
D)  Standard deviation units

Question 6

There is just one type of line graph.

Accepted Answer

A) True 
 B)False

Question 7

The range refers to:

Accepted Answer

A)  The difference between the lowest and highest score. 
B)  The difference between the mean and the median. 
C)  The mode in a bimodal distribution. 
D)  The difference between a score and the mean. 
A)  The difference between the lowest and highest score. 
B)  The difference between the mean and the median. 
C)  The mode in a bimodal distribution. 
D)  The difference between a score and the mean.

Question 8

Which of the data points in the following distribution seems to be an outlier: 8, 10, 12, 14, 12, 15, 2000?

Accepted Answer

A)  8 
B)  10 
C)  14 
D)  2000 
A)  8 
B)  10 
C)  14 
D)  2000

Question 9

What is the range of the following set of data: 10, 20, 40, 50, 70, 100, 110?

Accepted Answer

A)  90 
B)  80 
C)  10 
D)  100 
A)  90 
B)  80 
C)  10 
D)  100

Question 10

Describe and interpret the different measures of variability.

Accepted Answer

Measures of variability are statistical

Question 11

If you wanted to characterize, summarize, and/or explain data you had collected you would use:

Accepted Answer

A)  Descriptive statistics 
B)  Inferential statistics 
C)  Multiple regression 
D)  Hypothesis testing 
A)  Descriptive statistics 
B)  Inferential statistics 
C)  Multiple regression 
D)  Hypothesis testing

Question 12

Explain the difference between a frequency distribution and a grouped frequency distribution.

Accepted Answer

Frequency distribution and grouped frequ

Question 13

If the owner of Microsoft moved into your neighborhood, the distribution of incomes in your neighborhood would become highly skewed to the right.

Accepted Answer

A) True 
 B)False

Question 14

A partial regression coefficient shows the relationship between one IV in the multiple regression equation and the DV, controlling for the other IVs in the regression equation.

Accepted Answer

A) True 
 B)False

Question 15

On an IQ test with a mean of 100 and a standard deviation of 15, what is the z score for someone with an IQ of 70?

Accepted Answer

A)  -1.30 
B)  -2.00 
C)  -1.00 
D)  -13 
A)  -1.30 
B)  -2.00 
C)  -1.00 
D)  -13

Question 16

In graphing the frequencies of a single variable (e.g., in a bar graph, histogram, or line graph), the frequencies are put on which axis:

Accepted Answer

A)  X or abscissa 
B)  Y or ordinate 
A)  X or abscissa 
B)  Y or ordinate

Question 17

The variance is the square root of the standard deviation.

Accepted Answer

A) True 
 B)False

Question 18

Examine the frequency distribution listed below. The variable is the number of in-service training classes teachers have attended over a two-year period. This frequency distribution is an example of:

Accepted Answer

A)  descriptive statistics. 
B)  inferential statistics 
C)  measures of central tendency 
D)  a contingency table 
A)  descriptive statistics. 
B)  inferential statistics 
C)  measures of central tendency 
D)  a contingency table

Question 19

A partial regression coefficient is provided in simple regression but not in multiple regression.

Accepted Answer

A) True 
 B)False

Question 20

When data are more heterogeneous, the standard deviation will tend to be larger.

Accepted Answer

A) True 
 B)False

Exam 18: Descriptive Statistics

If you want to determine the relationship between two or more categorical variables, what should you do?

The purpose of descriptive statistics is to:

Measures of variability indicate:

Examine the following table. A researcher is interested in whether learning from instruction that includes video will be more likely to transfer (be applicable in new contexts) than learning that takes place with still photos or a written document. Which statement below is true?

A z score transforms a raw score into:

There is just one type of line graph.

The range refers to:

Which of the data points in the following distribution seems to be an outlier: 8, 10, 12, 14, 12, 15, 2000?

What is the range of the following set of data: 10, 20, 40, 50, 70, 100, 110?

Describe and interpret the different measures of variability.

If you wanted to characterize, summarize, and/or explain data you had collected you would use:

Explain the difference between a frequency distribution and a grouped frequency distribution.

If the owner of Microsoft moved into your neighborhood, the distribution of incomes in your neighborhood would become highly skewed to the right.

A partial regression coefficient shows the relationship between one IV in the multiple regression equation and the DV, controlling for the other IVs in the regression equation.

On an IQ test with a mean of 100 and a standard deviation of 15, what is the z score for someone with an IQ of 70?

In graphing the frequencies of a single variable (e.g., in a bar graph, histogram, or line graph), the frequencies are put on which axis:

The variance is the square root of the standard deviation.

Examine the frequency distribution listed below. The variable is the number of in-service training classes teachers have attended over a two-year period. This frequency distribution is an example of:

A partial regression coefficient is provided in simple regression but not in multiple regression.

When data are more heterogeneous, the standard deviation will tend to be larger.

Introduction to Educational Research

Quantitative, Qualitative, and Mixed Research

Action Research for Lifelong Learning

How to Review the Literature and Develop Research Questions

How to Write a Research Proposal

Research Ethics

Standardized Measurement and Assessment

How to Construct a Questionnaire

Methods of Data Collection

Sampling in Quantitative, Qualitative, and Mixed Research

Validity of Research Results in Quantitative, Qualitative, and Mixed Research

Experimental Research: Weak and Strong Designs

Experimental Research: Quasi and Single-Case Designs

Nonexperimental Quantitative Research

Narrative Inquiry and Case Study Research

Phenomenology, Ethnography, and Grounded Theory

Mixed Research

Inferential Statistics

Data Analysis in Qualitative and Mixed Research

How to Prepare a Research Report and Use Apa Style Guidelines

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