Question 1

The population mean is used to estimate the value of a sample mean.

Accepted Answer

A) True 
 B)False  False

Question 2

Which of the following can be used to estimate the median?

Accepted Answer

A) the 50th percentile of a relative percentage distribution 
B) the 50th percentile of a cumulative percentage distribution 
C) the mean 
D) the mode 
A) the 50th percentile of a relative percentage distribution 
B) the 50th percentile of a cumulative percentage distribution 
C) the mean 
D) the mode B

Question 3

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

Accepted Answer

A) True 
 B)False  True

Question 4

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

Accepted Answer

A) gender 
B) ethnicity 
C) rankings 
D) brand name 
A) gender 
B) ethnicity 
C) rankings 
D) brand name

Question 5

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 was 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 was multiplied or divided by the same constant

Question 6

The median is the balance point for a distribution.

Accepted Answer

A) True 
 B)False

Question 7

A researcher records 17 scores.What is the median position of these scores?

Accepted Answer

A) the 9th score in numeric order 
B) the average of the 9th and 10th scores in numeric order 
C) the average of the 8th and 9th scores in numeric order 
D) It's not possible to know this without the raw scores. 
A) the 9th score in numeric order 
B) the average of the 9th and 10th scores in numeric order 
C) the average of the 8th and 9th scores in numeric order 
D) It's not possible to know this without the raw scores.

Question 8

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 9

The mean is the balance point for a distribution.

Accepted Answer

A) True 
 B)False

Question 10

A researcher asks participants to estimate the calories they consume in a meal.The researcher records the following estimates: 450,426,310,500,and 220.If the researcher removes the estimate of 220 (perhaps because the participant drops out of the study),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 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 12

Some,but not all scores in a distribution,influences the value of the mean.

Accepted Answer

A) True 
 B)False

Question 13

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 14

A researcher measures the depth (in fathoms)of different points in the ocean affected most by pollution.Based on the scale of measurement for these data,describing the mean depth is appropriate.

Accepted Answer

A) True 
 B)False

Question 15

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 is 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 B and C 
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 B and C

Question 16

A researcher measures the following scores on an assessment: 2,3,7,3,5,6,and 9.In this example,the mean is smaller than the median.

Accepted Answer

A) True 
 B)False

Question 17

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 18

A researcher records the distance (in feet)travelled in a burning building by firemen during a rescue attempt.Based on the scale of measurement for these data,describing the mean distance travelled is appropriate.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) rankings 
B) gender 
C) volume in a container 
D) all of the above 
A) rankings 
B) gender 
C) volume in a container 
D) all of the above

The population mean is used to estimate the value of a sample mean.

Which of the following can be used to estimate the median?

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

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

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

The median is the balance point for a distribution.

A researcher records 17 scores.What is the median position of these scores?

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

The mean is the balance point for a distribution.

A researcher asks participants to estimate the calories they consume in a meal.The researcher records the following estimates: 450,426,310,500,and 220.If the researcher removes the estimate of 220 (perhaps because the participant drops out of the study),then the value of the mean will

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?

Some,but not all scores in a distribution,influences the value of the mean.

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

A researcher measures the depth (in fathoms)of different points in the ocean affected most by pollution.Based on the scale of measurement for these data,describing the mean depth is appropriate.

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 is this citation?

A researcher measures the following scores on an assessment: 2,3,7,3,5,6,and 9.In this example,the mean is smaller than the median.

A researcher records the distance (in feet)travelled in a burning building by firemen during a rescue attempt.Based on the scale of measurement for these data,describing the mean distance travelled is appropriate.

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

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

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

The population mean is used to estimate the value of a sample mean.

Which of the following can be used to estimate the median?

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

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

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

The median is the balance point for a distribution.

A researcher records 17 scores.What is the median position of these scores?

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

The mean is the balance point for a distribution.

A researcher asks participants to estimate the calories they consume in a meal.The researcher records the following estimates: 450,426,310,500,and 220.If the researcher removes the estimate of 220 (perhaps because the participant drops out of the study),then the value of the mean will

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?

Some,but not all scores in a distribution,influences the value of the mean.

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

A researcher measures the depth (in fathoms)of different points in the ocean affected most by pollution.Based on the scale of measurement for these data,describing the mean depth is appropriate.

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 is this citation?

A researcher measures the following scores on an assessment: 2,3,7,3,5,6,and 9.In this example,the mean is smaller than the median.

A researcher records the distance (in feet)travelled in a burning building by firemen during a rescue attempt.Based on the scale of measurement for these data,describing the mean distance travelled is appropriate.

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

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

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

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 is this citation?