Question 1

The purpose of a hypothesis test is

Accepted Answer

A) to measures the strength of the relationship between two variables. 
B) to determine the direction of the relationship between two variables. 
C) to determine whether the patterns observed in sample data justify a conclusion that there are corresponding patterns in the population. 
D) all of the other options are goals of a hypothesis test. 
A) to measures the strength of the relationship between two variables. 
B) to determine the direction of the relationship between two variables. 
C) to determine whether the patterns observed in sample data justify a conclusion that there are corresponding patterns in the population. 
D) all of the other options are goals of a hypothesis test.

Question 2

In a hypothesis test,standard error measures

Accepted Answer

A) the size of the treatment effect. 
B) variability for the sample data. 
C) the likelihood of a Type I or Type II error. 
D) the amount of difference between the sample and the population that is reasonable to expect just by chance. 
A) the size of the treatment effect. 
B) variability for the sample data. 
C) the likelihood of a Type I or Type II error. 
D) the amount of difference between the sample and the population that is reasonable to expect just by chance.

Question 3

A researcher has measured self-esteem for a sample of 40 first-grade children.If the researcher wanted to divide the children into two equal-sized groups consisting of the high self-esteem kids and the low self-esteem kids,which statistical measure would identify the correct score to serve as the boundary between the high and the low self-esteem groups?

Accepted Answer

A) the mean 
B) the median 
C) the mode 
D) the standard deviation 
A) the mean 
B) the median 
C) the mode 
D) the standard deviation

Question 4

The goal of descriptive statistics is to simplify,summarize,and organize data.

Accepted Answer

A) True 
 B)False

Question 5

Of the following research statistics,which one is not designed to correct problems with the calculation of split-half reliability?

Accepted Answer

A) Cohen's kappa 
B) Cronbach's alpha 
C) Kuder-Richardson formula 20 
D) Spearman-Brown formula 
A) Cohen's kappa 
B) Cronbach's alpha 
C) Kuder-Richardson formula 20 
D) Spearman-Brown formula

Question 6

A Type II error means that a researcher has

Accepted Answer

A) falsely concluded that a treatment has an effect. 
B) correctly concluded that a treatment has no effect. 
C) falsely concluded that a treatment has no effect. 
D) correctly concluded that a treatment has an effect. 
A) falsely concluded that a treatment has an effect. 
B) correctly concluded that a treatment has no effect. 
C) falsely concluded that a treatment has no effect. 
D) correctly concluded that a treatment has an effect.

Question 7

To construct a frequency distribution graph displaying a set of scores that were measured on a nominal or an ordinal scale,you should use

Accepted Answer

A) only a histogram. 
B) only a polygon. 
C) only a bar graph. 
D) either a histogram or a polygon. 
A) only a histogram. 
B) only a polygon. 
C) only a bar graph. 
D) either a histogram or a polygon.

Question 8

The median is the most commonly used measure of central tendency.

Accepted Answer

A) True 
 B)False

Question 9

Without some correction,split-half reliability

Accepted Answer

A) tends to overestimate the true reliability of the full test. 
B) tends to underestimate the true reliability of the full test. 
C) tends to be an inaccurate estimate of the true reliability of the full test. 
D) split-half reliability tends to be accurate without correction. 
A) tends to overestimate the true reliability of the full test. 
B) tends to underestimate the true reliability of the full test. 
C) tends to be an inaccurate estimate of the true reliability of the full test. 
D) split-half reliability tends to be accurate without correction.

Question 10

Without some correction,such as the Spearman-Brown formula,a correlation measuring split-half reliability will tend to overestimate the reliability for the full test.

Accepted Answer

A) True 
 B)False

Question 11

One reason for reporting measures of effect size is that a very small treatment effect observed in a sample can be statistically significant,especially if

Accepted Answer

A) the sample size is very large. 
B) the sample size is very small. 
C) the sample is not representative of the population. 
D) the sample is representative of the population. 
A) the sample size is very large. 
B) the sample size is very small. 
C) the sample is not representative of the population. 
D) the sample is representative of the population.

Question 12

A distribution of scores and a mean of 55 and a standard deviation of 4.The variance for this distribution is 16.

Accepted Answer

A) True 
 B)False

Question 13

A researcher reports a significant correlation using an alpha level of .01.The probability that the researcher is making a Type I error is p < .01.

Accepted Answer

A) True 
 B)False

Question 14

The mode is the best way to measure central tendency for data from a nominal scale of measurement.

Accepted Answer

A) True 
 B)False

Question 15

To construct a frequency distribution graph displaying a set of scores that were measured on an interval or a ratio scale,you should use

Accepted Answer

A) only a histogram. 
B) only a polygon. 
C) only a bar graph. 
D) either a histogram or a polygon. 
A) only a histogram. 
B) only a polygon. 
C) only a bar graph. 
D) either a histogram or a polygon.

Question 16

Identify the basic concern with using the percentage of agreement as a measure of inter-rater reliability and explain how this concern is addressed by Cohen's kappa.

Accepted Answer

The percentage of agreement between two

Question 17

A summary value,usually numerical,that describes a sample is called a parameter.

Accepted Answer

A) True 
 B)False

Question 18

The goal of a hypothesis test is to demonstrate that the patterns observed in the sample data represent real patterns in the population and are not simply due to chance or sampling error.

Accepted Answer

A) True 
 B)False

Question 19

What outcome is likely to occur for a hypothesis test evaluating a treatment that has a very large and robust effect?

Accepted Answer

A) a Type I error 
B) a Type II error 
C) correctly rejecting the null hypothesis 
D) correctly failing to reject the null hypothesis 
A) a Type I error 
B) a Type II error 
C) correctly rejecting the null hypothesis 
D) correctly failing to reject the null hypothesis

Question 20

Where is a score of X = 45 located in a distribution with a mean of 40 and a standard deviation of 12?

Accepted Answer

A) slightly above average 
B) far above average 
C) slightly below average 
D) far below average 
A) slightly above average 
B) far above average 
C) slightly below average 
D) far below average

The purpose of a hypothesis test is

In a hypothesis test,standard error measures

The goal of descriptive statistics is to simplify,summarize,and organize data.

Of the following research statistics,which one is not designed to correct problems with the calculation of split-half reliability?

A Type II error means that a researcher has

To construct a frequency distribution graph displaying a set of scores that were measured on a nominal or an ordinal scale,you should use

The median is the most commonly used measure of central tendency.

Without some correction,split-half reliability

Without some correction,such as the Spearman-Brown formula,a correlation measuring split-half reliability will tend to overestimate the reliability for the full test.

One reason for reporting measures of effect size is that a very small treatment effect observed in a sample can be statistically significant,especially if

A distribution of scores and a mean of 55 and a standard deviation of 4.The variance for this distribution is 16.

A researcher reports a significant correlation using an alpha level of .01.The probability that the researcher is making a Type I error is p < .01.

The mode is the best way to measure central tendency for data from a nominal scale of measurement.

To construct a frequency distribution graph displaying a set of scores that were measured on an interval or a ratio scale,you should use

Identify the basic concern with using the percentage of agreement as a measure of inter-rater reliability and explain how this concern is addressed by Cohen's kappa.

A summary value,usually numerical,that describes a sample is called a parameter.

The goal of a hypothesis test is to demonstrate that the patterns observed in the sample data represent real patterns in the population and are not simply due to chance or sampling error.

What outcome is likely to occur for a hypothesis test evaluating a treatment that has a very large and robust effect?

Where is a score of X = 45 located in a distribution with a mean of 40 and a standard deviation of 12?

Introduction, Acquiring Knowledge, and the Scientific Method

Research Ideas

Defining and Measuring Variables

Ethics in Research

Selecting Research Participants

Research Strategies and Validity

The Experimental Research Strategy

Experimental Designs: Between-Subjects Design

Experimental Designs: Within-Subjects Design

The Nonexperimental and Quasi-Experimental Strategies: Nonequivalent Group, Pre-Post, and Developmental Designs

Factorial Designs

The Correlational Research Strategy

Descriptive Research Strategy

Single-Subject Research Designs

Writing a Research Report

Filters

Exam 15: Statistical Evaluation of Data

The purpose of a hypothesis test is

In a hypothesis test,standard error measures

The goal of descriptive statistics is to simplify,summarize,and organize data.

Of the following research statistics,which one is not designed to correct problems with the calculation of split-half reliability?

A Type II error means that a researcher has

To construct a frequency distribution graph displaying a set of scores that were measured on a nominal or an ordinal scale,you should use

The median is the most commonly used measure of central tendency.

Without some correction,split-half reliability

Without some correction,such as the Spearman-Brown formula,a correlation measuring split-half reliability will tend to overestimate the reliability for the full test.

One reason for reporting measures of effect size is that a very small treatment effect observed in a sample can be statistically significant,especially if

A distribution of scores and a mean of 55 and a standard deviation of 4.The variance for this distribution is 16.

A researcher reports a significant correlation using an alpha level of .01.The probability that the researcher is making a Type I error is p < .01.

The mode is the best way to measure central tendency for data from a nominal scale of measurement.

To construct a frequency distribution graph displaying a set of scores that were measured on an interval or a ratio scale,you should use

Identify the basic concern with using the percentage of agreement as a measure of inter-rater reliability and explain how this concern is addressed by Cohen's kappa.

A summary value,usually numerical,that describes a sample is called a parameter.

The goal of a hypothesis test is to demonstrate that the patterns observed in the sample data represent real patterns in the population and are not simply due to chance or sampling error.

What outcome is likely to occur for a hypothesis test evaluating a treatment that has a very large and robust effect?

Where is a score of X = 45 located in a distribution with a mean of 40 and a standard deviation of 12?

Introduction, Acquiring Knowledge, and the Scientific Method

Research Ideas

Defining and Measuring Variables

Ethics in Research

Selecting Research Participants

Research Strategies and Validity

The Experimental Research Strategy

Experimental Designs: Between-Subjects Design

Experimental Designs: Within-Subjects Design

The Nonexperimental and Quasi-Experimental Strategies: Nonequivalent Group, Pre-Post, and Developmental Designs

Factorial Designs

The Correlational Research Strategy

Descriptive Research Strategy

Single-Subject Research Designs

Writing a Research Report

Filters