Question 1

Which of the following is not a symbol used with samples?

Accepted Answer

A)  x 
B)  M 
C)  $\mu$ 
D)  n 
A)  x 
B)  M 
C)  $\mu$ 
D)  n C

Question 2

What terms refer to the meaning of each of the following measures,respectively: mean,median,and mode?

Accepted Answer

A)  middle, most, and average 
B)  average, middle, and most 
C)  average, most, and middle 
D)  most, average, and middle 
A)  middle, most, and average 
B)  average, middle, and most 
C)  average, most, and middle 
D)  most, average, and middle B

Question 3

To measure attraction,a researcher records the following data for the distance (in inches)between two persons sitting in a waiting room: 46,32,10,23,18,46,and 60.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. C

Question 4

A researcher reports "the average patron (n = 22)in a local bar consumed more than twice the number of drinks (per day)on weekends (M = 5.4 drinks)compared to weekdays (M = 2.3 drinks)." Although not stated directly,how do we know that the patrons in this study constitute a sample and not a population of patrons at this local bar?

Accepted Answer

A)  We can't know for sure because this was not stated directly. 
B)  The notation for a sample mean was used. 
C)  The notation for a sample size was used. 
D)  Both the notation for a sample mean was used and the notation for a sample size was used. 
A)  We can't know for sure because this was not stated directly. 
B)  The notation for a sample mean was used. 
C)  The notation for a sample size was used. 
D)  Both the notation for a sample mean was used and the notation for a sample size was used.

Question 5

When would it be appropriate to calculate a population mean?

Accepted Answer

A)  When data are measured for a portion of individuals from a population. 
B)  When the sample mean is not available. 
C)  When data are measured for all members of a population. 
D)  When it is not possible to measure all data in a population. 
A)  When data are measured for a portion of individuals from a population. 
B)  When the sample mean is not available. 
C)  When data are measured for all members of a population. 
D)  When it is not possible to measure all data in a population.

Question 6

A researcher records the following scores: 5,3,7,6,2,8,0,and 1.In terms of these data,the sum of the squared differences of scores from their mean is ______.

Accepted Answer

A)  0 
B)  8 
C)  60 
D)  164 
A)  0 
B)  8 
C)  60 
D)  164

Question 7

A staff member records the number of victories (per 10-game season)for a new football coach during his first three seasons with a team.The coach won 1,3,and 8 games,respectively,over the three seasons.Which conclusion is appropriate?

Accepted Answer

A)  The football coach won an average of four games per season. 
B)  The football coach won a median of three games per season. 
C)  The football coach won 40% of his games during his first three seasons. 
D)  All of these. 
A)  The football coach won an average of four games per season. 
B)  The football coach won a median of three games per season. 
C)  The football coach won 40% of his games during his first three seasons. 
D)  All of these.

Question 8

A researcher selects a sample of 6 men and 11 women.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 the combined sample of 17 total 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 9

It is appropriate to use the mode with the mean to describe data that are skewed.

Accepted Answer

A) True 
 B)False

Question 10

A weighted mean weighs the mean by the sample size for each sample in the formula.

Accepted Answer

A) True 
 B)False

Question 11

If a portion of people from a population are asked to complete an assessment,then the average score among that group of people would be considered a

Accepted Answer

A)  sample mean. 
B)  population mean. 
C)  median split. 
D)  modal mean. 
A)  sample mean. 
B)  population mean. 
C)  median split. 
D)  modal mean.

Question 12

A researcher measures the following scores on a quiz: 0,3,7,3,5,4,and 6.In this example,the mean is larger than the median.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following statements about a weighted mean is true?

Accepted Answer

A)  The weighted mean is always equal to the arithmetic mean. 
B)  The weighted mean can only be reported if the sample size is equal in each group. 
C)  The weighted mean is used to compute the combined mean for two or more samples of scores in which the number of scores in each sample is disproportionate or unequal. 
D)  The weighted mean is heavier than an arithmetic mean. 
A)  The weighted mean is always equal to the arithmetic mean. 
B)  The weighted mean can only be reported if the sample size is equal in each group. 
C)  The weighted mean is used to compute the combined mean for two or more samples of scores in which the number of scores in each sample is disproportionate or unequal. 
D)  The weighted mean is heavier than an arithmetic mean.

Question 14

It is possible to compute a sample mean that is larger than the value of the actual population mean.

Accepted Answer

A) True 
 B)False

Question 15

Although the mean is a measure of central tendency,it is not always located exactly at the center of a distribution.

Accepted Answer

A) True 
 B)False

Question 16

The median cannot be at the center of a distribution if the mean is also at the center of the distribution.

Accepted Answer

A) True 
 B)False

Question 17

The mean is the balance point for a distribution.

Accepted Answer

A) True 
 B)False

Question 18

The ______ is an arithmetic mean of a weighted or disproportionate set of scores.

Accepted Answer

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

Question 19

The population mean is symbolized as ______,whereas the sample mean 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 20

A researcher asks adult participants to rank their top five favorite songs from their childhood.Based on the scale of measurement described,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

Which of the following is not a symbol used with samples?

What terms refer to the meaning of each of the following measures,respectively: mean,median,and mode?

To measure attraction,a researcher records the following data for the distance (in inches)between two persons sitting in a waiting room: 46,32,10,23,18,46,and 60.Is the mode equal to the median in this example?

When would it be appropriate to calculate a population mean?

A researcher records the following scores: 5,3,7,6,2,8,0,and 1.In terms of these data,the sum of the squared differences of scores from their mean is ______.

A staff member records the number of victories (per 10-game season)for a new football coach during his first three seasons with a team.The coach won 1,3,and 8 games,respectively,over the three seasons.Which conclusion is appropriate?

It is appropriate to use the mode with the mean to describe data that are skewed.

A weighted mean weighs the mean by the sample size for each sample in the formula.

If a portion of people from a population are asked to complete an assessment,then the average score among that group of people would be considered a

A researcher measures the following scores on a quiz: 0,3,7,3,5,4,and 6.In this example,the mean is larger than the median.

Which of the following statements about a weighted mean is true?

It is possible to compute a sample mean that is larger than the value of the actual population mean.

Although the mean is a measure of central tendency,it is not always located exactly at the center of a distribution.

The median cannot be at the center of a distribution if the mean is also at the center of the distribution.

The mean is the balance point for a distribution.

The ______ is an arithmetic mean of a weighted or disproportionate set of scores.

The population mean is symbolized as ,whereas the sample mean is symbolized as .

A researcher asks adult participants to rank their top five favorite songs from their childhood.Based on the scale of measurement described,which measure of central tendency is most appropriate to describe these data?

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

Which of the following is not a symbol used with samples?

What terms refer to the meaning of each of the following measures,respectively: mean,median,and mode?

To measure attraction,a researcher records the following data for the distance (in inches)between two persons sitting in a waiting room: 46,32,10,23,18,46,and 60.Is the mode equal to the median in this example?

When would it be appropriate to calculate a population mean?

A researcher records the following scores: 5,3,7,6,2,8,0,and 1.In terms of these data,the sum of the squared differences of scores from their mean is ______.

A staff member records the number of victories (per 10-game season)for a new football coach during his first three seasons with a team.The coach won 1,3,and 8 games,respectively,over the three seasons.Which conclusion is appropriate?

It is appropriate to use the mode with the mean to describe data that are skewed.

A weighted mean weighs the mean by the sample size for each sample in the formula.

If a portion of people from a population are asked to complete an assessment,then the average score among that group of people would be considered a

A researcher measures the following scores on a quiz: 0,3,7,3,5,4,and 6.In this example,the mean is larger than the median.

Which of the following statements about a weighted mean is true?

It is possible to compute a sample mean that is larger than the value of the actual population mean.

Although the mean is a measure of central tendency,it is not always located exactly at the center of a distribution.

The median cannot be at the center of a distribution if the mean is also at the center of the distribution.

The mean is the balance point for a distribution.

The ______ is an arithmetic mean of a weighted or disproportionate set of scores.

The population mean is symbolized as ______,whereas the sample mean is symbolized as ______.

A researcher asks adult participants to rank their top five favorite songs from their childhood.Based on the scale of measurement described,which measure of central tendency is most appropriate to describe these data?

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

The population mean is symbolized as ,whereas the sample mean is symbolized as .