Question 1

Explain positive skew and negative skew.

Accepted Answer

Positive skew and negative skew are term

Question 2

Line graphs should used to depict:

Accepted Answer

A)  Nominal variables only 
B)  Categorical variables only 
C)  Trends over time 
D)  Percentile ranks 
A)  Nominal variables only 
B)  Categorical variables only 
C)  Trends over time 
D)  Percentile ranks

Question 3

Let us suppose we are predicting the score on a training posttest from the number of years of education and the score on an aptitude test given before training. Here is the regression equation: Y = 25 + .5X1 +10X2,
Where X1 = years of education and X2 = aptitude test score.
What is the predicted score for someone with 10 years of education and an aptitude test score of 5?

Accepted Answer

A)  25 
B)  50 
C)  35 
D)  80 
A)  25 
B)  50 
C)  35 
D)  80

Question 4

If a set of scores is very variable, they are said to be __________, whereas when they do not vary a great deal they are said to be___________.

Accepted Answer

A)  Homogeneous, Heterogeneous 
B)  Heterogeneous, Homogeneous 
C)  Modal, Median 
D)  Positively skewed, Negatively skewed 
A)  Homogeneous, Heterogeneous 
B)  Heterogeneous, Homogeneous 
C)  Modal, Median 
D)  Positively skewed, Negatively skewed

Question 5

If you square the standard deviation, what do you obtain?

Accepted Answer

A)  Range 
B)  Variance 
C)  Percentile rank 
D)  Median 
A)  Range 
B)  Variance 
C)  Percentile rank 
D)  Median

Explain positive skew and negative skew.

Line graphs should used to depict:

If a set of scores is very variable, they are said to be , whereas when they do not vary a great deal they are said to be_.

If you square the standard deviation, what do you obtain?

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

Filters

Exam 18: Descriptive Statistics

Explain positive skew and negative skew.

Line graphs should used to depict:

If a set of scores is very variable, they are said to be __________, whereas when they do not vary a great deal they are said to be___________.

If you square the standard deviation, what do you obtain?

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

Filters

If a set of scores is very variable, they are said to be , whereas when they do not vary a great deal they are said to be_.