Question 1

Draw a normal distribution. Now show the percentage of scores that fall within various ranges defined by standard deviations from the mean.

Accepted Answer

To draw a normal distribution, we start

Question 2

What is the difference between a grouped frequency distribution and a relative frequency distribution?

Accepted Answer

A grouped frequency distribution and a r

Question 3

Which of the following statements regarding grouped frequency distributions is not true?

Accepted Answer

A) All class intervals must be the same width. 
B) Class intervals should not overlap. 
C) There should be no more than seven class intervals. 
D) Each score may fall in only one class interval. 
A) All class intervals must be the same width. 
B) Class intervals should not overlap. 
C) There should be no more than seven class intervals. 
D) Each score may fall in only one class interval.

Question 4

What does a z-score tell us?

Accepted Answer

A) Where a score falls in a distribution of scores 
B) The difference between two participants' scores 
C) The standard deviation 
D) The percentage of participants who have a particular score 
A) Where a score falls in a distribution of scores 
B) The difference between two participants' scores 
C) The standard deviation 
D) The percentage of participants who have a particular score

Question 5

What is the median of these scores: 1, 2, 4, 5, 6, 6, 1?

Accepted Answer

A) 3)57 
B) 4 
C) 5 
D) These data have no median. 
A) 3)57 
B) 4 
C) 5 
D) These data have no median.

Question 6

The sample mean for a set of data is 75, with a 95% confidence interval of 15. What is the best interpretation of these results?

Accepted Answer

A) There is a 95% probability that the population mean is 75. 
B) If we conducted the study many times, the population mean would fall inside 95% of the confidence intervals for those studies. 
C) The population mean is between 60 and 90. 
D) Ninety-five percent of samples from this population would have a mean between 15 and 75. 
A) There is a 95% probability that the population mean is 75. 
B) If we conducted the study many times, the population mean would fall inside 95% of the confidence intervals for those studies. 
C) The population mean is between 60 and 90. 
D) Ninety-five percent of samples from this population would have a mean between 15 and 75.

Question 7

Scores on a test range from 12 to 90, with a mean of 60 and a standard deviation of 10. If a particular participant scored 40 on the test, his z-score would be

Accepted Answer

A) .40. 
B) -.10. 
C) -2.0. 
D) .70. 
A) .40. 
B) -.10. 
C) -2.0. 
D) .70.

Question 8

Distinguish between a frequency polygon and a histogram.

Accepted Answer

A frequency polygon and a histogram are

Question 9

A distribution in which there are more low scores than high scores is

Accepted Answer

A) an outlier. 
B) normally distributed. 
C) negatively skewed. 
D) positively skewed. 
A) an outlier. 
B) normally distributed. 
C) negatively skewed. 
D) positively skewed.

Question 10

Describe a simple frequency distribution.

Accepted Answer

A simple frequency distribution is a sta

Question 11

What does a confidence interval tell us?

Accepted Answer

A confidence interval is a range of valu

Question 12

John has a z-score of -2.8, whereas Mary has a z-score of +1.9. Whose score is more extreme in the distribution of scores?

Accepted Answer

A) John's 
B) Mary's 
C) They are equally extreme. 
D) Neither score is extreme. 
A) John's 
B) Mary's 
C) They are equally extreme. 
D) Neither score is extreme.

Question 13

What rules regarding class intervals must a researcher keep in mind when constructing a grouped frequency distribution?

Accepted Answer

When constructing a grouped frequency di

Question 14

When describing data, researchers should choose methods that

Accepted Answer

A) reflect as much of the raw data as possible. 
B) are statistically sophisticated. 
C) are easily comprehended. 
D) best support the researcher's predictions. 
A) reflect as much of the raw data as possible. 
B) are statistically sophisticated. 
C) are easily comprehended. 
D) best support the researcher's predictions.

Question 15

If the variability in a set of data is small,

Accepted Answer

A) participants' scores differ a great deal from one another. 
B) the mean is a good reflection of the set of scores. 
C) the standard deviation will be large. 
D) the confidence interval will be large. 
A) participants' scores differ a great deal from one another. 
B) the mean is a good reflection of the set of scores. 
C) the standard deviation will be large. 
D) the confidence interval will be large.

Question 16

Which of the following is not a measure of central tendency?

Accepted Answer

A) Mode 
B) Standard deviation 
C) Median 
D) Mean 
A) Mode 
B) Standard deviation 
C) Median 
D) Mean

Question 17

A researcher used a measure of self-esteem that has a mean of 50 and a standard deviation of 10. If 1,000 respondents completed the scale, how many would she expect to score above the mean?

Accepted Answer

A) 250 
B) 340 
C) 500 
D) 680 
A) 250 
B) 340 
C) 500 
D) 680

Question 18

How would you convert a grouped frequency distribution to a relative frequency distribution?

Accepted Answer

A) Divide the frequency of each class interval by the mean. 
B) Plot it on a graph. 
C) Divide the frequency of each class interval by the total number of scores. 
D) Sum the frequencies in each class interval. 
A) Divide the frequency of each class interval by the mean. 
B) Plot it on a graph. 
C) Divide the frequency of each class interval by the total number of scores. 
D) Sum the frequencies in each class interval.

Question 19

A researcher is studying patterns of marriage and divorce among Chinese immigrants. This is an example of _______ research.

Accepted Answer

A) longitudinal 
B) epidemiological 
C) quasi-experimental 
D) demographic 
A) longitudinal 
B) epidemiological 
C) quasi-experimental 
D) demographic

Question 20

Which measure of central tendency is used most often?

Accepted Answer

A) Mode 
B) Variance 
C) Median 
D) Mean 
A) Mode 
B) Variance 
C) Median 
D) Mean

Draw a normal distribution. Now show the percentage of scores that fall within various ranges defined by standard deviations from the mean.

What is the difference between a grouped frequency distribution and a relative frequency distribution?

Which of the following statements regarding grouped frequency distributions is not true?

What does a z-score tell us?

What is the median of these scores: 1, 2, 4, 5, 6, 6, 1?

The sample mean for a set of data is 75, with a 95% confidence interval of 15. What is the best interpretation of these results?

Scores on a test range from 12 to 90, with a mean of 60 and a standard deviation of 10. If a particular participant scored 40 on the test, his z-score would be

Distinguish between a frequency polygon and a histogram.

A distribution in which there are more low scores than high scores is

Describe a simple frequency distribution.

What does a confidence interval tell us?

John has a z-score of -2.8, whereas Mary has a z-score of +1.9. Whose score is more extreme in the distribution of scores?

What rules regarding class intervals must a researcher keep in mind when constructing a grouped frequency distribution?

When describing data, researchers should choose methods that

If the variability in a set of data is small,

Which of the following is not a measure of central tendency?

A researcher used a measure of self-esteem that has a mean of 50 and a standard deviation of 10. If 1,000 respondents completed the scale, how many would she expect to score above the mean?

How would you convert a grouped frequency distribution to a relative frequency distribution?

A researcher is studying patterns of marriage and divorce among Chinese immigrants. This is an example of _______ research.

Which measure of central tendency is used most often?

Research in the Behavioral Sciences

Behavioral Variability and Research

The Measurement of Behavior

Approaches to Psychological Measurement

Selecting Research Participants

Correlational Research

Advanced Correlational Strategies

Basic Issues in Experimental Research

Experimental Design

Analyzing Experimental Data: Basic Concepts

Statistical Analysis

Quasi-Experimental Designs

Single-Case Research

Ethical Issues in Behavioral Research

Scientific Writing

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Exam 6: Descriptive Research

Draw a normal distribution. Now show the percentage of scores that fall within various ranges defined by standard deviations from the mean.

What is the difference between a grouped frequency distribution and a relative frequency distribution?

Which of the following statements regarding grouped frequency distributions is not true?

What does a z-score tell us?

What is the median of these scores: 1, 2, 4, 5, 6, 6, 1?

The sample mean for a set of data is 75, with a 95% confidence interval of 15. What is the best interpretation of these results?

Scores on a test range from 12 to 90, with a mean of 60 and a standard deviation of 10. If a particular participant scored 40 on the test, his z-score would be

Distinguish between a frequency polygon and a histogram.

A distribution in which there are more low scores than high scores is

Describe a simple frequency distribution.

What does a confidence interval tell us?

John has a z-score of -2.8, whereas Mary has a z-score of +1.9. Whose score is more extreme in the distribution of scores?

What rules regarding class intervals must a researcher keep in mind when constructing a grouped frequency distribution?

When describing data, researchers should choose methods that

If the variability in a set of data is small,

Which of the following is not a measure of central tendency?

A researcher used a measure of self-esteem that has a mean of 50 and a standard deviation of 10. If 1,000 respondents completed the scale, how many would she expect to score above the mean?

How would you convert a grouped frequency distribution to a relative frequency distribution?

A researcher is studying patterns of marriage and divorce among Chinese immigrants. This is an example of _______ research.

Which measure of central tendency is used most often?

Research in the Behavioral Sciences

Behavioral Variability and Research

The Measurement of Behavior

Approaches to Psychological Measurement

Selecting Research Participants

Correlational Research

Advanced Correlational Strategies

Basic Issues in Experimental Research

Experimental Design

Analyzing Experimental Data: Basic Concepts

Statistical Analysis

Quasi-Experimental Designs

Single-Case Research

Ethical Issues in Behavioral Research

Scientific Writing

Filters