Question 1

The median is the preferred measure of central tendency when

Accepted Answer

A) the scale of measurement is nominal. 
B) the scale of measurement is ordinal. 
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 scale of measurement is ordinal. 
C) the scale of measurement is ratio. 
D) the distribution is symmetrical and the scale of measurement is interval or ratio. B

Question 2

For the following set of scores,what is (are)   ?
 7,8,10,10,11,12,13,13,15

Accepted Answer

A) 4,3,2,1,0,1,-1,-2,-2,-4 
B) -4,-3,-1,-1,0,1,2,2,4 
C) 4,3,1,1,0,1,2,2,4 
D) 0 
A) 4,3,2,1,0,1,-1,-2,-2,-4 
B) -4,-3,-1,-1,0,1,2,2,4 
C) 4,3,1,1,0,1,2,2,4 
D) 0 B

Question 3

µ is the symbol for the

Accepted Answer

A) population median. 
B) population mode. 
C) population mean. 
D) sample mean. 
A) population median. 
B) population mode. 
C) population mean. 
D) sample mean. C

Question 4

When it is impossible to obtain all the scores in a population,the best estimate of the population mean is the

Accepted Answer

A) population median. 
B) sample mean. 
C) sample mode. 
D) sample median. 
A) population median. 
B) sample mean. 
C) sample mode. 
D) sample median.

Question 5

To obtain the mean,we would

Accepted Answer

A) count all the scores and divide by the total number of scores. 
B) add all the scores and divide by the sum of all the scores. 
C) divide the total number of scores by the sum of all the scores. 
D) add all the scores and divide by the total number of scores. 
A) count all the scores and divide by the total number of scores. 
B) add all the scores and divide by the sum of all the scores. 
C) divide the total number of scores by the sum of all the scores. 
D) add all the scores and divide by the total number of scores.

Question 6

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 7

Five students took a personality test.Their deviation scores were -4,+3,+1,-2,+2.Assuming that these scores form a normal distribution,which deviation(s)represent the score(s)having the highest frequency?

Accepted Answer

A) -4 
B) +3 
C) -2 and +2 
D) +1 
A) -4 
B) +3 
C) -2 and +2 
D) +1

Question 8

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.

Question 9

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

Accepted Answer

A) +1,+2 and F1F1F1S1F1F1F102,+3,-4 
B) -4,+3,+2 and -2,+1 
C) -4,-2,+1,+2,+3 
D) +3,+2,+1,-2,-4 
A) +1,+2 and F1F1F1S1F1F1F102,+3,-4 
B) -4,+3,+2 and -2,+1 
C) -4,-2,+1,+2,+3 
D) +3,+2,+1,-2,-4

Question 10

When we refer to a score's deviation,we are referring to

Accepted Answer

A) how far it is from other scores. 
B) how far it is from the mean. 
C) how close it is to the other scores. 
D) how much error occurred in measuring it. 
A) how far it is from other scores. 
B) how far it is from the mean. 
C) how close it is to the other scores. 
D) how much error occurred in measuring it.

Question 11

Find the mean of the following data set. 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

Accepted Answer

A) 5 
B) 4 
C) 5.24 
D) 7 
A) 5 
B) 4 
C) 5.24 
D) 7

Question 12

When deciding which type of measure of central tendency is appropriate,we consider the scale of measurement used to measure the

Accepted Answer

A) variability of the distribution. 
B) mean. 
C) independent variable. 
D) dependent variable. 
A) variability of the distribution. 
B) mean. 
C) independent variable. 
D) dependent variable.

Question 13

In a skewed distribution,the mathematical center is

Accepted Answer

A) the median,which is the point around which most of the scores tend to be located. 
B) the mode,which is the point around which most of the scores tend to be located. 
C) the mean,which is not the point around which most of the scores tend to be located. 
D) impossible to determine. 
A) the median,which is the point around which most of the scores tend to be located. 
B) the mode,which is the point around which most of the scores tend to be located. 
C) the mean,which is not the point around which most of the scores tend to be located. 
D) impossible to determine.

Question 14

Find the mode of the following data set: 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

Accepted Answer

A) 5 
B) 4 
C) 5.24 
D) 7 
A) 5 
B) 4 
C) 5.24 
D) 7

Question 15

Based on the following results of an experiment,how many errors would a person who drank 4 oz.of alcohol make?

Accepted Answer

A) 4 
B) 9.2 
C) about 10 
D) 12 
A) 4 
B) 9.2 
C) about 10 
D) 12

Question 16

When deciding which type of graph (bar,line,histogram,etc. )is appropriate,we consider the characteristics of the

Accepted Answer

A) variability of the distribution. 
B) mean. 
C) independent variable. 
D) dependent variable. 
A) variability of the distribution. 
B) mean. 
C) independent variable. 
D) dependent variable.

Question 17

Which measure of central tendency is appropriate if the shape of the distribution is severely skewed?

Accepted Answer

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

Question 18

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 random 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 random 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 random 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 random sample drawn from the population.

Question 19

An experimenter investigated the ability to concentrate as a function of eye color.Eye color was classified as having either blue eyes,brown eyes,or other eye color.Which type of graph should the experimenter use to display the results?

Accepted Answer

A) X and Y 
B) histogram 
C) bar 
D) line 
A) X and Y 
B) histogram 
C) bar 
D) line

Question 20

A score's deviation conveys two pieces of information about the score's location: The number indicates _____,and the sign indicates _____.

Accepted Answer

A) the score's distance from the mean;whether the score is greater or less than the mean 
B) whether the score is greater or less than the mean;the score's distance from the mean 
C) the size of the score;whether the score is a good score 
D) whether the score is a good score;whether the score is positive or negative 
A) the score's distance from the mean;whether the score is greater or less than the mean 
B) whether the score is greater or less than the mean;the score's distance from the mean 
C) the size of the score;whether the score is a good score 
D) whether the score is a good score;whether the score is positive or negative

The median is the preferred measure of central tendency when

For the following set of scores,what is (are) ? 7,8,10,10,11,12,13,13,15

µ is the symbol for the

When it is impossible to obtain all the scores in a population,the best estimate of the population mean is the

To obtain the mean,we would

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,which deviation(s)represent the score(s)having the highest frequency?

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

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

When we refer to a score's deviation,we are referring to

Find the mean of the following data set. 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

When deciding which type of measure of central tendency is appropriate,we consider the scale of measurement used to measure the

In a skewed distribution,the mathematical center is

Find the mode of the following data set: 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

Based on the following results of an experiment,how many errors would a person who drank 4 oz.of alcohol make?

When deciding which type of graph (bar,line,histogram,etc. )is appropriate,we consider the characteristics of the

Which measure of central tendency is appropriate if the shape of the distribution is severely skewed?

The population mean is estimated by

An experimenter investigated the ability to concentrate as a function of eye color.Eye color was classified as having either blue eyes,brown eyes,or other eye color.Which type of graph should the experimenter use to display the results?

A score's deviation conveys two pieces of information about the score's location: The number indicates _,and the sign indicates _.

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Linear Regression

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

Exam 4: Measures of Central Tendency;the Mean, median, and Mode

The median is the preferred measure of central tendency when

For the following set of scores,what is (are) ? 7,8,10,10,11,12,13,13,15

µ is the symbol for the

When it is impossible to obtain all the scores in a population,the best estimate of the population mean is the

To obtain the mean,we would

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,which deviation(s)represent the score(s)having the highest frequency?

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

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

When we refer to a score's deviation,we are referring to

Find the mean of the following data set. 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

When deciding which type of measure of central tendency is appropriate,we consider the scale of measurement used to measure the

In a skewed distribution,the mathematical center is

Find the mode of the following data set: 8,7,2,4,4,8,2,4,6,5,7,3,9,4,5,4,7

Based on the following results of an experiment,how many errors would a person who drank 4 oz.of alcohol make?

When deciding which type of graph (bar,line,histogram,etc. )is appropriate,we consider the characteristics of the

Which measure of central tendency is appropriate if the shape of the distribution is severely skewed?

The population mean is estimated by

An experimenter investigated the ability to concentrate as a function of eye color.Eye color was classified as having either blue eyes,brown eyes,or other eye color.Which type of graph should the experimenter use to display the results?

A score's deviation conveys two pieces of information about the score's location: The number indicates _____,and the sign indicates _____.

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Linear Regression

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

A score's deviation conveys two pieces of information about the score's location: The number indicates _,and the sign indicates _.