Question 1

When we graph results from an experiment, a line graph is appropriate when

Accepted Answer

A) the independent variable is interval or ratio. 
B) the independent variable is nominal or ordinal. 
C) the dependent variable is nominal or ordinal. 
D) the dependent variable is interval or ratio. 
A) the independent variable is interval or ratio. 
B) the independent variable is nominal or ordinal. 
C) the dependent variable is nominal or ordinal. 
D) the dependent variable is interval or ratio. A

Question 2

The mean is used most often in behavioral research because researchers tend to

Accepted Answer

A) measure variables that have interval or ratio scores, and the scores form approximately normal distributions. 
B) conduct research in which the mathematical center of a distribution is required. 
C) conduct research in which only the most frequently occurring score is needed. 
D) measure variables that have interval or ratio scores, and the scores usually do not form a normal distribution. 
A) measure variables that have interval or ratio scores, and the scores form approximately normal distributions. 
B) conduct research in which the mathematical center of a distribution is required. 
C) conduct research in which only the most frequently occurring score is needed. 
D) measure variables that have interval or ratio scores, and the scores usually do not form a normal distribution. A

Question 3

Find the mean of the scores in the following frequency distribution.

Accepted Answer

6.21

Question 4

The sum of the deviations around the mean.

Accepted Answer

A) always equals zero. 
B) always equals one. 
C) typically but not always equals zero. 
D) typically but not always equals one. 
A) always equals zero. 
B) always equals one. 
C) typically but not always equals zero. 
D) typically but not always equals one.

Question 5

What is the mode in the following data set?
5 4 4 5 6 8 1 1 8 6

Accepted Answer

There isn't a mode s

Question 6

Suppose you did a study with four different experimental conditions.Note what would likely have to present for evidence of a relationship to be present.

Accepted Answer

There would have to be a different patte

Question 7

When a very skewed distribution is involved,

Accepted Answer

A) use the mode because the most frequently occurring score will be the point around which most scores will be located. 
B) use the median because it is more representative of most of the scores. 
C) use the mean because it will best represent the extreme scores in the tail. 
D) no measure of central tendency should be calculated. 
A) use the mode because the most frequently occurring score will be the point around which most scores will be located. 
B) use the median because it is more representative of most of the scores. 
C) use the mean because it will best represent the extreme scores in the tail. 
D) no measure of central tendency should be calculated.

Question 8

The population mean is estimated by

Accepted Answer

A) calculating the mean of as many scores as we can get from the population. 
B) calculating the mean of a sample drawn from the population. 
C) calculating the mean of a sample and then transforming it to reflect the size of the population. 
D) calculating all measures of central tendency for a sample drawn from the population. 
A) calculating the mean of as many scores as we can get from the population. 
B) calculating the mean of a sample drawn from the population. 
C) calculating the mean of a sample and then transforming it to reflect the size of the population. 
D) calculating all measures of central tendency for a sample drawn from the population.

Question 9

What is the ΣX for the scores of 5, 1, 5, 2, and 10?

Accepted Answer

A) 23 
B) 500 
C) 5 
D) 4.6 
A) 23 
B) 500 
C) 5 
D) 4.6

Question 10

Why shouldn't the mode be used with the following set of scores? 2, 5, 3, 3, 4, 2, 4, 5, 1, 1

Accepted Answer

A) The data are obviously not nominal. 
B) There is no mode. 
C) The scores are positively skewed. 
D) The scores are negatively skewed. 
A) The data are obviously not nominal. 
B) There is no mode. 
C) The scores are positively skewed. 
D) The scores are negatively skewed.

Question 11

An experimenter investigated the ability to concentrate under different conditions of crowding.Concentration was measured as the amount of time it took the participant to complete a word puzzle.How should the experimenter summarize the scores on the dependent variable?

Accepted Answer

A) Find the mode for crowding because crowding scores are nominal. 
B) Find the mean amount of crowding, if crowding scores are normally distributed. 
C) Find the mean amount of time it took to solve the puzzle, if time scores are normally distributed. 
D) Find the median amount of time it took to solve the puzzle because time scores are ordinal. 
A) Find the mode for crowding because crowding scores are nominal. 
B) Find the mean amount of crowding, if crowding scores are normally distributed. 
C) Find the mean amount of time it took to solve the puzzle, if time scores are normally distributed. 
D) Find the median amount of time it took to solve the puzzle because time scores are ordinal.

Question 12

Suppose you are told that your exam score is exactly at the median.What does this tell you about where your score falls in the distribution?

Accepted Answer

Since your score is at the med

Question 13

An experiment has been conducted using three different conditions on the independent variable.For each of the conditions, a sample group mean of 15 was obtained.Assuming each condition results in a normal distribution, how many normal distributions do we envision from this experiment, and what are their population means?

Accepted Answer

Since all the sample means are

Question 14

A bimodal distribution will have modes).

Accepted Answer

A) two 
B) two or fewer 
C) two or more 
D) no 
A) two 
B) two or fewer 
C) two or more 
D) no

Question 15

The median is the appropriate measure of central tendency when

Accepted Answer

A) the scale of measurement is nominal. 
B) the scores are ordinal, or when the distribution is skewed and the scores are interval or ratio. 
C) the scale of measurement is ratio. 
D) the distribution is symmetrical, and the scale of measurement is interval or ratio. 
A) the scale of measurement is nominal. 
B) the scores are ordinal, or when the distribution is skewed and the scores are interval or ratio. 
C) the scale of measurement is ratio. 
D) the distribution is symmetrical, and the scale of measurement is interval or ratio.

Question 16

When we graph the results of an experiment, the Y axis indicates the

Accepted Answer

A) measure of central tendency we have used for the dependent variable. 
B) raw score values for each subject on the dependent variable. 
C) raw score values for each subject on the independent variable. 
D) levels of the independent variable. 
A) measure of central tendency we have used for the dependent variable. 
B) raw score values for each subject on the dependent variable. 
C) raw score values for each subject on the independent variable. 
D) levels of the independent variable.

Question 17

A deviation is more informative than a raw score because it

Accepted Answer

A) describes the shape of the distribution. 
B) has a greater numeric value. 
C) is a transformation of the raw score. 
D) gives the score's location relative to the mean. 
A) describes the shape of the distribution. 
B) has a greater numeric value. 
C) is a transformation of the raw score. 
D) gives the score's location relative to the mean.

Question 18

The best predictor of an individual score in a sample of scores is the

Accepted Answer

A) sum of the deviations of the scores from the mean. 
B) score minus the mean. 
C) mean of the sample of scores. 
D) total error in the sample of scores. 
A) sum of the deviations of the scores from the mean. 
B) score minus the mean. 
C) mean of the sample of scores. 
D) total error in the sample of scores.

Question 19

Five students took a personality test.Their deviation scores were -4, +3, +1, -2, +2.Assuming that these scores form a normal distribution, arrange the deviations so their order represents their ranking in terms of frequency, from highest to lowest?

Accepted Answer

+1, +2 and

Question 20

In an effort to quit smoking, Pat began eating butterscotch hard candies.For the month of September, Pat's mean was 24 pieces of candy per day.What was the total number of butterscotch candies that Pat consumed in September?

Accepted Answer

The answer of In an effort to quit smoking, Pat...

When we graph results from an experiment, a line graph is appropriate when

The mean is used most often in behavioral research because researchers tend to

Find the mean of the scores in the following frequency distribution.

The sum of the deviations around the mean.

What is the mode in the following data set? 5 4 4 5 6 8 1 1 8 6

Suppose you did a study with four different experimental conditions.Note what would likely have to present for evidence of a relationship to be present.

When a very skewed distribution is involved,

The population mean is estimated by

What is the ΣX for the scores of 5, 1, 5, 2, and 10?

Why shouldn't the mode be used with the following set of scores? 2, 5, 3, 3, 4, 2, 4, 5, 1, 1

An experimenter investigated the ability to concentrate under different conditions of crowding.Concentration was measured as the amount of time it took the participant to complete a word puzzle.How should the experimenter summarize the scores on the dependent variable?

Suppose you are told that your exam score is exactly at the median.What does this tell you about where your score falls in the distribution?

A bimodal distribution will have modes).

The median is the appropriate measure of central tendency when

When we graph the results of an experiment, the Y axis indicates the

A deviation is more informative than a raw score because it

The best predictor of an individual score in a sample of scores is the

Five students took a personality test.Their deviation scores were -4, +3, +1, -2, +2.Assuming that these scores form a normal distribution, arrange the deviations so their order represents their ranking in terms of frequency, from highest to lowest?

In an effort to quit smoking, Pat began eating butterscotch hard candies.For the month of September, Pat's mean was 24 pieces of candy per day.What was the total number of butterscotch candies that Pat consumed in September?

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Variability

Describing Data With Z-Scores and the Normal Curve

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters

Exam 3: Summarizing Scores With Measures of Central Tendency

When we graph results from an experiment, a line graph is appropriate when

The mean is used most often in behavioral research because researchers tend to

Find the mean of the scores in the following frequency distribution.

The sum of the deviations around the mean.

What is the mode in the following data set? 5 4 4 5 6 8 1 1 8 6

Suppose you did a study with four different experimental conditions.Note what would likely have to present for evidence of a relationship to be present.

When a very skewed distribution is involved,

The population mean is estimated by

What is the ΣX for the scores of 5, 1, 5, 2, and 10?

Why shouldn't the mode be used with the following set of scores? 2, 5, 3, 3, 4, 2, 4, 5, 1, 1

An experimenter investigated the ability to concentrate under different conditions of crowding.Concentration was measured as the amount of time it took the participant to complete a word puzzle.How should the experimenter summarize the scores on the dependent variable?

Suppose you are told that your exam score is exactly at the median.What does this tell you about where your score falls in the distribution?

A bimodal distribution will have modes).

The median is the appropriate measure of central tendency when

When we graph the results of an experiment, the Y axis indicates the

A deviation is more informative than a raw score because it

The best predictor of an individual score in a sample of scores is the

Five students took a personality test.Their deviation scores were -4, +3, +1, -2, +2.Assuming that these scores form a normal distribution, arrange the deviations so their order represents their ranking in terms of frequency, from highest to lowest?

In an effort to quit smoking, Pat began eating butterscotch hard candies.For the month of September, Pat's mean was 24 pieces of candy per day.What was the total number of butterscotch candies that Pat consumed in September?

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Variability

Describing Data With Z-Scores and the Normal Curve

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters