Question 1

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 weight mean can only be reported id 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 weight mean can only be reported id 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 2

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 3

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 4

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 5

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) 32 
D) 60 
A) 0 
B) 8 
C) 32 
D) 60

Question 6

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.

Question 7

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 8

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 sample size was used. 
D) both B and C 
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 sample size was used. 
D) both B and C

Question 9

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 10

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 11

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 12

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

Accepted Answer

A) True 
 B)False

Question 13

The mode and the median are always the same value.

Accepted Answer

A) True 
 B)False

Question 14

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 15

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

Question 16

The mean would be used to describe which of the following variables?

Accepted Answer

A) rankings 
B) distance traveled in miles 
C) gender 
D) model of car 
A) rankings 
B) distance traveled in miles 
C) gender 
D) model of car

Question 17

The formula for a population and sample mean only differ by notation;otherwise,these formulas are calculated the same.

Accepted Answer

A) True 
 B)False

Question 18

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 19

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 20

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 the above 
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 the above

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

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

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.

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 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

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?

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

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

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.

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

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

The mode and the median are always the same value.

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

The mode is an appropriate measure of central tendency for

The mean would be used to describe which of the following variables?

The formula for a population and sample mean only differ by notation;otherwise,these formulas are calculated the same.

The median is an appropriate measure of central tendency for

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

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?

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: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

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 statements about a weighted mean is true.

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

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.

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 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

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?

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

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

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.

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

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

The mode and the median are always the same value.

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

The mode is an appropriate measure of central tendency for

The mean would be used to describe which of the following variables?

The formula for a population and sample mean only differ by notation;otherwise,these formulas are calculated the same.

The median is an appropriate measure of central tendency for

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

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?

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: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

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