Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

The ________ is the value that occurs most often or at the highest frequency in a distribution.

Accepted Answer

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

Question 3

The sample mean is symbolized as M;the population mean is symbolized as $\mu$.

Accepted Answer

A) True 
 B)False

Question 4

The size of a population is symbolized as ________,whereas the size of a sample is symbolized as ________.

Accepted Answer

A) $\mu$;M 
B) M;$\mu$ 
C) n;N 
D) N;n 
A) $\mu$;M 
B) M;$\mu$ 
C) n;N 
D) N;n

Question 5

The mode should be used with the mean to describe skewed distributions.

Accepted Answer

A) True 
 B)False

Question 6

The median is the balance point for a distribution.

Accepted Answer

A) True 
 B)False

Question 7

A researcher selects a sample of 6 males and 11 females.She asks participants to rate the likelihood they would do female-stereotyped jobs (such as nursing or school teaching)on a scale from 1 = not likely at all to 5 = very likely.Men indicated that they would be less likely to do these jobs (M = 2.1)compared with women (M = 4.3).What is the weighted mean for this entire sample of 17 participants?

Accepted Answer

A) 2.1 
B) 4.3 
C) 3.2 
D) 3.5 
A) 2.1 
B) 4.3 
C) 3.2 
D) 3.5

Question 8

The numerator of the sample mean and the population mean is the same.

Accepted Answer

A) True 
 B)False

Question 9

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

Question 10

A researcher asks participants to estimate the height (in inches)of a statue that was in a waiting area.The researcher records the following estimates: 40,46,30,50,and 34.If the researcher removes the estimate of 40 (say,due to an experimenter error),then the value of the mean will

Accepted Answer

A) decrease 
B) increase 
C) remain the same 
D) become negative 
A) decrease 
B) increase 
C) remain the same 
D) become negative

Question 11

A researcher records the following data for the number of dreams recalled during a night of sleep for 10 college students: 3,2,4,4,3,1,1,0,2,and 0.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 12

The distribution of personal income for U.S.citizens is positively skewed.If the median annual income is $44,000,this implies that the mean annual income is

Accepted Answer

A) smaller 
B) larger 
C) the same 
D) There is not enough information to answer this question. 
A) smaller 
B) larger 
C) the same 
D) There is not enough information to answer this question.

Question 13

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 14

A weighted mean must be used when the "weights" are all equal.

Accepted Answer

A) True 
 B)False

Question 15

A weighted mean is appropriate when describing the mean for two or more samples with equal sample sizes.

Accepted Answer

A) True 
 B)False

Question 16

The fact that the sum of the differences of scores from their mean is zero best illustrates that

Accepted Answer

A) the mean is at the center of a distribution 
B) the mean is the "balance point" of a distribution 
C) the mean is equal to zero 
D) the mean can never be negative 
A) the mean is at the center of a distribution 
B) the mean is the "balance point" of a distribution 
C) the mean is equal to zero 
D) the mean can never be negative

Question 17

The median is an appropriate measure of central tendency for

Accepted Answer

A) data that are positively skewed 
B) data that are negatively skewed 
C) data that are on an ordinal scale 
D) all of the above 
A) data that are positively skewed 
B) data that are negatively skewed 
C) data that are on an ordinal scale 
D) all of the above

Question 18

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 the above 
A) sample mean 
B) population mean 
C) restricted mean 
D) none of the above

Question 19

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

Accepted Answer

A) minimal 
B) zero 
C) negative 
D) negligible 
A) minimal 
B) zero 
C) negative 
D) negligible

Question 20

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.

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

The ________ is the value that occurs most often or at the highest frequency in a distribution.

The sample mean is symbolized as M;the population mean is symbolized as $\mu$ .

The size of a population is symbolized as ,whereas the size of a sample is symbolized as .

The mode should be used with the mean to describe skewed distributions.

The median is the balance point for a distribution.

The numerator of the sample mean and the population mean is the same.

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?

A researcher asks participants to estimate the height (in inches)of a statue that was in a waiting area.The researcher records the following estimates: 40,46,30,50,and 34.If the researcher removes the estimate of 40 (say,due to an experimenter error),then the value of the mean will

A researcher records the following data for the number of dreams recalled during a night of sleep for 10 college students: 3,2,4,4,3,1,1,0,2,and 0.Is the mean equal to the median in this example?

The distribution of personal income for U.S.citizens is positively skewed.If the median annual income is $44,000,this implies that the mean annual income is

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 weighted mean must be used when the "weights" are all equal.

A weighted mean is appropriate when describing the mean for two or more samples with equal sample sizes.

The fact that the sum of the differences of scores from their mean is zero best illustrates that

The median is an appropriate measure of central tendency for

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

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?

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Characteristics of the Sample Mean

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample T Test With Confidence Intervals

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

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

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Understanding Correlation Coefficients in Statistical Analysis

Filters

Exam 3: Summarizing Data: Central Tendency

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

The ________ is the value that occurs most often or at the highest frequency in a distribution.

The sample mean is symbolized as M;the population mean is symbolized as μ\muμ .

The size of a population is symbolized as ________,whereas the size of a sample is symbolized as ________.

The mode should be used with the mean to describe skewed distributions.

The median is the balance point for a distribution.

The numerator of the sample mean and the population mean is the same.

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?

A researcher asks participants to estimate the height (in inches)of a statue that was in a waiting area.The researcher records the following estimates: 40,46,30,50,and 34.If the researcher removes the estimate of 40 (say,due to an experimenter error),then the value of the mean will

A researcher records the following data for the number of dreams recalled during a night of sleep for 10 college students: 3,2,4,4,3,1,1,0,2,and 0.Is the mean equal to the median in this example?

The distribution of personal income for U.S.citizens is positively skewed.If the median annual income is $44,000,this implies that the mean annual income is

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 weighted mean must be used when the "weights" are all equal.

A weighted mean is appropriate when describing the mean for two or more samples with equal sample sizes.

The fact that the sum of the differences of scores from their mean is zero best illustrates that

The median is an appropriate measure of central tendency for

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

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?

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Characteristics of the Sample Mean

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample T Test With Confidence Intervals

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

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

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Understanding Correlation Coefficients in Statistical Analysis

Filters

The sample mean is symbolized as M;the population mean is symbolized as $\mu$ .

The size of a population is symbolized as ,whereas the size of a sample is symbolized as .