Question 1

How many independent variables can there be in regression models?

Accepted Answer

A)  none 
B)  one 
C)  two 
D)  three or more 
A)  none 
B)  one 
C)  two 
D)  three or more

Question 2

"The value around which the deviations sum to zero" is the definition of which of the following?

Accepted Answer

A)  mean 
B)  median 
C)  mode 
D)  null set 
A)  mean 
B)  median 
C)  mode 
D)  null set

Question 3

Which of the following is useful for describing the averages of skewed distributions?

Accepted Answer

A)  mean 
B)  median 
C)  mode 
D)  null set 
A)  mean 
B)  median 
C)  mode 
D)  null set

Question 4

Which of the following is NOT part of determining the practical significance of random error?

Accepted Answer

A)  cost-benefit analysis 
B)  multiple regression analysis 
C)  crucial difference analysis 
D)  client acceptability 
A)  cost-benefit analysis 
B)  multiple regression analysis 
C)  crucial difference analysis 
D)  client acceptability

Question 5

If a researcher compares two means for significance, what difference in probability will the ANOVA and the t test find?

Accepted Answer

A)  ANOVA will be slightly higher 
B)  t test will be slightly higher 
C)  none 
D)  can't be determined from this information 
A)  ANOVA will be slightly higher 
B)  t test will be slightly higher 
C)  none 
D)  can't be determined from this information

Question 6

What is interquartile range?

Accepted Answer

A)  range of the middle 50% of results 
B)  range of the middle 25% of results 
C)  variability within each quarter of data 
D)  variability between each quarter of data 
A)  range of the middle 50% of results 
B)  range of the middle 25% of results 
C)  variability within each quarter of data 
D)  variability between each quarter of data

Question 7

Which type of statistics helps researchers describe a population's average age?

Accepted Answer

A)  univariate statistics 
B)  bivariate statistics 
C)  multivariate statistics 
D)  inferential statistics 
A)  univariate statistics 
B)  bivariate statistics 
C)  multivariate statistics 
D)  inferential statistics

Question 8

Which of the following will consumers of research be most concerned with when considering an analysis of variance (ANOVA) test of the null hypothesis?

Accepted Answer

A)  a statistic called F 
B)  mean square 
C)  sum of squares 
D)  p value 
A)  a statistic called F 
B)  mean square 
C)  sum of squares 
D)  p value

Question 9

Regression is similar to correlation because it looks for what type of relationship between variables?

Accepted Answer

A)  a linear association 
B)  an independent association 
C)  a dependent association 
D)  a causal link 
A)  a linear association 
B)  an independent association 
C)  a dependent association 
D)  a causal link

Question 10

Which of the following is the name of the curve that is symmetrical?

Accepted Answer

A)  normal curve 
B)  frequency polygon 
C)  positive skew 
D)  negative skew 
A)  normal curve 
B)  frequency polygon 
C)  positive skew 
D)  negative skew

Question 11

What does sampling error result from?

Accepted Answer

A)  random chance 
B)  biased sample selection 
C)  confounding variables 
D)  lack of a control group 
A)  random chance 
B)  biased sample selection 
C)  confounding variables 
D)  lack of a control group

Question 12

Which variable type corresponds to the outcome being measured?

Accepted Answer

A)  dependent 
B)  independent 
C)  categorical 
D)  nominal 
A)  dependent 
B)  independent 
C)  categorical 
D)  nominal

Question 13

In analysis of variance, each way in which participants are classified yields what?

Accepted Answer

A)  a main effect 
B)  a side effect 
C)  a dependent variable 
D)  a p-value 
A)  a main effect 
B)  a side effect 
C)  a dependent variable 
D)  a p-value

Question 14

If a researcher fails to reject a null hypothesis, the difference in question is statistically significant.

Accepted Answer

A) True 
 B)False

Question 15

This topic describes how many types of considerations for determining practical significance?

Accepted Answer

A)  four 
B)  five 
C)  six 
D)  seven 
A)  four 
B)  five 
C)  six 
D)  seven

Question 16

Statistical significance addresses whether a difference is reliable in light of what?

Accepted Answer

A)  computational errors 
B)  sampling errors 
C)  study design errors 
D)  random errors 
A)  computational errors 
B)  sampling errors 
C)  study design errors 
D)  random errors

Question 17

Which type of statistics helps researchers examine the relationship between a population's age, height, and weight?

Accepted Answer

A)  univariate statistics 
B)  bivariate statistics 
C)  multivariate statistics 
D)  inferential statistics 
A)  univariate statistics 
B)  bivariate statistics 
C)  multivariate statistics 
D)  inferential statistics

Question 18

When the relationship between two variables is perfect and inverse, what is the value of r?

Accepted Answer

A)  -0.1 
B)  -1.0 
C)  0.1 
D)  1.0 
A)  -0.1 
B)  -1.0 
C)  0.1 
D)  1.0

Question 19

If the median for a group of participants is 25.00, what percentage of the participants has scores above a score of 25.00?

Accepted Answer

A)  25% 
B)  50% 
C)  75% 
D)  can't be determined from this information 
A)  25% 
B)  50% 
C)  75% 
D)  can't be determined from this information

Question 20

What is the null hypothesis?

Accepted Answer

A)  the possibility that the sample is fatally biased 
B)  the possibility that the results are improperly calculated 
C)  the possibility that the results are random chance 
D)  the possibility that the true result is within the margin of error 
A)  the possibility that the sample is fatally biased 
B)  the possibility that the results are improperly calculated 
C)  the possibility that the results are random chance 
D)  the possibility that the true result is within the margin of error

How many independent variables can there be in regression models?

"The value around which the deviations sum to zero" is the definition of which of the following?

Which of the following is useful for describing the averages of skewed distributions?

Which of the following is NOT part of determining the practical significance of random error?

If a researcher compares two means for significance, what difference in probability will the ANOVA and the t test find?

What is interquartile range?

Which type of statistics helps researchers describe a population's average age?

Which of the following will consumers of research be most concerned with when considering an analysis of variance (ANOVA) test of the null hypothesis?

Regression is similar to correlation because it looks for what type of relationship between variables?

Which of the following is the name of the curve that is symmetrical?

What does sampling error result from?

Which variable type corresponds to the outcome being measured?

In analysis of variance, each way in which participants are classified yields what?

If a researcher fails to reject a null hypothesis, the difference in question is statistically significant.

This topic describes how many types of considerations for determining practical significance?

Statistical significance addresses whether a difference is reliable in light of what?

Which type of statistics helps researchers examine the relationship between a population's age, height, and weight?

When the relationship between two variables is perfect and inverse, what is the value of r?

If the median for a group of participants is 25.00, what percentage of the participants has scores above a score of 25.00?

What is the null hypothesis?

Introduction to Research Methods

Reviewing and Citing the Literature

Basic Concepts in Quantitative Research

Sampling

Measurement

Qualitative Research Design

Designing Experimental Research

Effect Size and Meta-Analysis

Preparing Research Reports

Filters

Exam 8: Analyzing Data: Understanding Statistics

How many independent variables can there be in regression models?

"The value around which the deviations sum to zero" is the definition of which of the following?

Which of the following is useful for describing the averages of skewed distributions?

Which of the following is NOT part of determining the practical significance of random error?

If a researcher compares two means for significance, what difference in probability will the ANOVA and the t test find?

What is interquartile range?

Which type of statistics helps researchers describe a population's average age?

Which of the following will consumers of research be most concerned with when considering an analysis of variance (ANOVA) test of the null hypothesis?

Regression is similar to correlation because it looks for what type of relationship between variables?

Which of the following is the name of the curve that is symmetrical?

What does sampling error result from?

Which variable type corresponds to the outcome being measured?

In analysis of variance, each way in which participants are classified yields what?

If a researcher fails to reject a null hypothesis, the difference in question is statistically significant.

This topic describes how many types of considerations for determining practical significance?

Statistical significance addresses whether a difference is reliable in light of what?

Which type of statistics helps researchers examine the relationship between a population's age, height, and weight?

When the relationship between two variables is perfect and inverse, what is the value of r?

If the median for a group of participants is 25.00, what percentage of the participants has scores above a score of 25.00?

What is the null hypothesis?

Introduction to Research Methods

Reviewing and Citing the Literature

Basic Concepts in Quantitative Research

Sampling

Measurement

Qualitative Research Design

Designing Experimental Research

Effect Size and Meta-Analysis

Preparing Research Reports

Filters