Question 1

Multiplying or dividing each score in a distribution by the same constant will

Accepted Answer

A)  cause the mean to change by that constant. 
B)  not change the mean at all because each score is multiplied or divided by the same constant. 
A)  cause the mean to change by that constant. 
B)  not change the mean at all because each score is multiplied or divided by the same constant.

Question 2

The mode is an appropriate measure of central tendency for

Accepted Answer

A)  data that are bimodal. 
B)  use with other measures of central tendency. 
C)  data that are on a nominal scale. 
D)  all of these. 
A)  data that are bimodal. 
B)  use with other measures of central tendency. 
C)  data that are on a nominal scale. 
D)  all of these.

Question 3

A researcher records the following data for the number of different food items chosen by seven participants in a buffet-style setting: 1,6,2,5,4,3,and 7.Is the mean equal to the median in this example?

Accepted Answer

A)  Yes. 
B)  No; the median is larger than the mean. 
C)  No; the mean is larger than the median. 
D)  There is not enough information to answer this question. 
A)  Yes. 
B)  No; the median is larger than the mean. 
C)  No; the mean is larger than the median. 
D)  There is not enough information to answer this question.

Question 4

A researcher records the following data for the number of times an interviewer is interrupted during a series of interviews: 0,0,3,2,5,3,0,8,0,2,1,and 1.Is the mode equal to the median in this example?

Accepted Answer

A)  Yes. 
B)  No; the median is larger than the mode. 
C)  No; the mode is larger than the median. 
D)  There is not enough information to answer this question. 
A)  Yes. 
B)  No; the median is larger than the mode. 
C)  No; the mode is larger than the median. 
D)  There is not enough information to answer this question.

Question 5

Adding a new score to a set of scores will change the mean,even when the score that is added is equal to the mean.

Accepted Answer

A) True 
 B)False

Question 6

The formulas for a population mean and a sample mean are defined using the same notation.

Accepted Answer

A) True 
 B)False

Question 7

A researcher records the time (in seconds)that participants arrive late for a scheduled research study.Assuming these data are normally distributed,which measure of central tendency is most appropriate to describe these data?

Accepted Answer

A)  mean 
B)  median 
C)  mode 
D)  None; it is inappropriate to describe the central tendency of these data. 
A)  mean 
B)  median 
C)  mode 
D)  None; it is inappropriate to describe the central tendency of these data.

Question 8

Given the same set of data for a population and sample,would the mean for both data sets be equal?

Accepted Answer

A)  No, the population mean would be larger. 
B)  No, the sample mean would be larger. 
C)  Yes, but only if the sample size equaled the population size. 
D)  Yes, this would be true anytime both data sets are the same. 
A)  No, the population mean would be larger. 
B)  No, the sample mean would be larger. 
C)  Yes, but only if the sample size equaled the population size. 
D)  Yes, this would be true anytime both data sets are the same.

Question 9

Three measures of central tendency are the mean,median,and range.

Accepted Answer

A) True 
 B)False

Question 10

The mode can be used to describe modal distributions.

Accepted Answer

A) True 
 B)False

Question 11

The mode can be used with the mean to describe which of the following variables?

Accepted Answer

A)  rankings 
B)  gender 
C)  the winning percentage of teams in a league 
D)  all of these 
A)  rankings 
B)  gender 
C)  the winning percentage of teams in a league 
D)  all of these

Question 12

A researcher records the hospital admission rates for coronary heart disease at 10 local hospitals.She finds that two different hospitals had the highest overall rates of hospital admissions.Which measure of central tendency did this researcher use to describe these data?

Accepted Answer

A)  mean 
B)  median 
C)  mode 
D)  range 
A)  mean 
B)  median 
C)  mode 
D)  range

Question 13

A researcher reports that "the average shopper in the sample (n = 12)purchased $65.00 worth of items ($\mu$ = $65.00)during a busy shopping day." What mistake was made in this citation?

Accepted Answer

A)  None; this citation is written appropriately. 
B)  The sample mean is written using the wrong notation. 
C)  The sample size is written using the wrong notation. 
D)  Both the sample mean is written using the wrong notation and the sample size is written using the wrong notation. 
A)  None; this citation is written appropriately. 
B)  The sample mean is written using the wrong notation. 
C)  The sample size is written using the wrong notation. 
D)  Both the sample mean is written using the wrong notation and the sample size is written using the wrong notation.

Question 14

Which of the following is NOT a characteristic of the mean?

Accepted Answer

A)  Add a score above the mean and the mean will increase. 
B)  Add a score below the mean and the mean will decrease. 
C)  Delete a score below the mean and the mean will increase. 
D)  Delete a score above the mean and the mean will increase. 
A)  Add a score above the mean and the mean will increase. 
B)  Add a score below the mean and the mean will decrease. 
C)  Delete a score below the mean and the mean will increase. 
D)  Delete a score above the mean and the mean will increase.

Question 15

Which type of mean is used to describe a portion of individuals in a given population?

Accepted Answer

A)  sample mean 
B)  population mean 
C)  restricted mean 
D)  none of these 
A)  sample mean 
B)  population mean 
C)  restricted mean 
D)  none of these

Question 16

The sum of the squared differences of scores from their mean is zero.

Accepted Answer

A) True 
 B)False

Question 17

The weighted mean is used to determine the mean for samples with unequal sample sizes.

Accepted Answer

A) True 
 B)False

Question 18

A researcher records the following data for how participants rated the likability (on a scale from 1 = not liked at all to 7 = very likable)of an individual who blushed after making a mistake: 5,4,7,6,6,4,6,7,2,5,and 6.Is the mode equal to the median in this example?

Accepted Answer

A)  Yes. 
B)  No; the median is larger than the mode. 
C)  No; the mode is larger than the median. 
D)  There is not enough information to answer this question. 
A)  Yes. 
B)  No; the median is larger than the mode. 
C)  No; the mode is larger than the median. 
D)  There is not enough information to answer this question.

Question 19

The mode and the median are always the same value.

Accepted Answer

A) True 
 B)False

Question 20

The mean,median,and mode are all the same value in a normal distribution.

Accepted Answer

A) True 
 B)False

Multiplying or dividing each score in a distribution by the same constant will

The mode is an appropriate measure of central tendency for

A researcher records the following data for the number of different food items chosen by seven participants in a buffet-style setting: 1,6,2,5,4,3,and 7.Is the mean equal to the median in this example?

A researcher records the following data for the number of times an interviewer is interrupted during a series of interviews: 0,0,3,2,5,3,0,8,0,2,1,and 1.Is the mode equal to the median in this example?

Adding a new score to a set of scores will change the mean,even when the score that is added is equal to the mean.

The formulas for a population mean and a sample mean are defined using the same notation.

A researcher records the time (in seconds)that participants arrive late for a scheduled research study.Assuming these data are normally distributed,which measure of central tendency is most appropriate to describe these data?

Given the same set of data for a population and sample,would the mean for both data sets be equal?

Three measures of central tendency are the mean,median,and range.

The mode can be used to describe modal distributions.

The mode can be used with the mean to describe which of the following variables?

A researcher records the hospital admission rates for coronary heart disease at 10 local hospitals.She finds that two different hospitals had the highest overall rates of hospital admissions.Which measure of central tendency did this researcher use to describe these data?

A researcher reports that "the average shopper in the sample (n = 12)purchased $65.00 worth of items ( $\mu$ = $65.00)during a busy shopping day." What mistake was made in this citation?

Which of the following is NOT a characteristic of the mean?

Which type of mean is used to describe a portion of individuals in a given population?

The sum of the squared differences of scores from their mean is zero.

The weighted mean is used to determine the mean for samples with unequal sample sizes.

A researcher records the following data for how participants rated the likability (on a scale from 1 = not liked at all to 7 = very likable)of an individual who blushed after making a mistake: 5,4,7,6,6,4,6,7,2,5,and 6.Is the mode equal to the median in this example?

The mode and the median are always the same value.

The mean,median,and mode are all the same value in a normal distribution.

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Variability

Probability

Probability, normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance,effect Size,and Power

Testing Means: One-Sample and Two-Independent-Sample T Tests

Testing Means: Truehe Related-Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

Exam 3: Summarizing Data: Central Tendency

Multiplying or dividing each score in a distribution by the same constant will

The mode is an appropriate measure of central tendency for

A researcher records the following data for the number of different food items chosen by seven participants in a buffet-style setting: 1,6,2,5,4,3,and 7.Is the mean equal to the median in this example?

A researcher records the following data for the number of times an interviewer is interrupted during a series of interviews: 0,0,3,2,5,3,0,8,0,2,1,and 1.Is the mode equal to the median in this example?

Adding a new score to a set of scores will change the mean,even when the score that is added is equal to the mean.

The formulas for a population mean and a sample mean are defined using the same notation.

A researcher records the time (in seconds)that participants arrive late for a scheduled research study.Assuming these data are normally distributed,which measure of central tendency is most appropriate to describe these data?

Given the same set of data for a population and sample,would the mean for both data sets be equal?

Three measures of central tendency are the mean,median,and range.

The mode can be used to describe modal distributions.

The mode can be used with the mean to describe which of the following variables?

A researcher records the hospital admission rates for coronary heart disease at 10 local hospitals.She finds that two different hospitals had the highest overall rates of hospital admissions.Which measure of central tendency did this researcher use to describe these data?

A researcher reports that "the average shopper in the sample (n = 12)purchased $65.00 worth of items ( μ\muμ = $65.00)during a busy shopping day." What mistake was made in this citation?

Which of the following is NOT a characteristic of the mean?

Which type of mean is used to describe a portion of individuals in a given population?

The sum of the squared differences of scores from their mean is zero.

The weighted mean is used to determine the mean for samples with unequal sample sizes.

A researcher records the following data for how participants rated the likability (on a scale from 1 = not liked at all to 7 = very likable)of an individual who blushed after making a mistake: 5,4,7,6,6,4,6,7,2,5,and 6.Is the mode equal to the median in this example?

The mode and the median are always the same value.

The mean,median,and mode are all the same value in a normal distribution.

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Variability

Probability

Probability, normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance,effect Size,and Power

Testing Means: One-Sample and Two-Independent-Sample T Tests

Testing Means: Truehe Related-Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

A researcher reports that "the average shopper in the sample (n = 12)purchased $65.00 worth of items ( $\mu$ = $65.00)during a busy shopping day." What mistake was made in this citation?