Question 1

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

Question 2

A researcher records the following data for the number of complaints filed (per day)following a controversial policy change at a local business: 3,8,5,0,4,6,2,1,1,4,2,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 3

The sample mean equal to 3.20 is equal to a population mean of 3.20.

Accepted Answer

A) True 
 B)False

Question 4

What terms refer to 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

Question 5

When would a researcher calculate a population mean?

Accepted Answer

A) when data are measured for of a portion of individuals from a population 
B) when the sample mean it 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 of a portion of individuals from a population 
B) when the sample mean it 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 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 7

A researcher selects a sample of 6 professors,6 students,and 6 administrators at a local school and has them rate the effectiveness of an innovative new teaching style.In this example,is it possible that the weighted mean ratings will equal the arithmetic mean for the entire sample of 18 participants?

Accepted Answer

A) No,the weighted mean is never exactly equal to the arithmetic mean. 
B) Yes,because there are an even number of participants in each sample. 
C) Yes,because the sample sizes are equal in this example. 
D) It is not possible to know this without knowing the mean for each sample. 
A) No,the weighted mean is never exactly equal to the arithmetic mean. 
B) Yes,because there are an even number of participants in each sample. 
C) Yes,because the sample sizes are equal in this example. 
D) It is not possible to know this without knowing the mean for each sample.

Question 8

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 9

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 10

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 11

The mode and the median are always the same value.

Accepted Answer

A) True 
 B)False

Question 12

A researcher records 52 scores.What is the median position of these scores?

Accepted Answer

A) the 26th score in numeric order 
B) the average of the 26th and 27th scores in numeric order 
C) the 27th score in numeric order 
D) It's not possible to know this without the raw scores. 
A) the 26th score in numeric order 
B) the average of the 26th and 27th scores in numeric order 
C) the 27th score in numeric order 
D) It's not possible to know this without the raw scores.

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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 15

The mean is an appropriate measure of central tendency for

Accepted Answer

A) data that are normally distributed 
B) data that are on an interval or ratio scale 
C) data in which the mean,median,and mode are equal 
D) all of the above 
A) data that are normally distributed 
B) data that are on an interval or ratio scale 
C) data in which the mean,median,and mode are equal 
D) all of the above

Question 16

The mode is the middle score in a distribution.

Accepted Answer

A) True 
 B)False

Question 17

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

Question 18

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 19

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

Accepted Answer

A) True 
 B)False

Question 20

A researcher records the hospital admission rates for coronary heart disease at 10 local hospitals.She finds that 2 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

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

A researcher records the following data for the number of complaints filed (per day)following a controversial policy change at a local business: 3,8,5,0,4,6,2,1,1,4,2,and 0.Is the mean equal to the median in this example?

The sample mean equal to 3.20 is equal to a population mean of 3.20.

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

When would a researcher calculate a population mean?

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.

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

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.

A researcher records 52 scores.What is the median position of these scores?

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

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

The mean is an appropriate measure of central tendency for

The mode is the middle score in a distribution.

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

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

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

A researcher records the hospital admission rates for coronary heart disease at 10 local hospitals.She finds that 2 different hospitals had the highest overall rates of hospital admissions.Which measure of central tendency did this researcher use to describe these data?

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

A researcher records the following data for the number of complaints filed (per day)following a controversial policy change at a local business: 3,8,5,0,4,6,2,1,1,4,2,and 0.Is the mean equal to the median in this example?

The sample mean equal to 3.20 is equal to a population mean of 3.20.

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

When would a researcher calculate a population mean?

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.

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

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.

A researcher records 52 scores.What is the median position of these scores?

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

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

The mean is an appropriate measure of central tendency for

The mode is the middle score in a distribution.

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

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

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

A researcher records the hospital admission rates for coronary heart disease at 10 local hospitals.She finds that 2 different hospitals had the highest overall rates of hospital admissions.Which measure of central tendency did this researcher use to describe these data?

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

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?