Question 1

Three measures of central tendency are the mean,median,and range.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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 4

A professor grades 120 research papers and reports that the average score was an 80%.What do we know about the sum of the differences of these 120 scores from their mean of 80%?

Accepted Answer

A) The sum of the differences is minimal. 
B) The sum of the differences is 80%,the same as the mean. 
C) The sum of the differences is equal to zero. 
D) It is impossible to know without knowing each of the 120 scores. 
A) The sum of the differences is minimal. 
B) The sum of the differences is 80%,the same as the mean. 
C) The sum of the differences is equal to zero. 
D) It is impossible to know without knowing each of the 120 scores.

Question 5

A skewed distribution tends to pull the median,but not the mean,toward outliers in the data.

Accepted Answer

A) True 
 B)False

Question 6

The mode is the middle score in a distribution.

Accepted Answer

A) True 
 B)False

Question 7

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 8

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

Question 9

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 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 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 12

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

Accepted Answer

A) True 
 B)False

Question 13

Adding the same constant to each score in a distribution (or subtracting the same constant from it)will

Accepted Answer

A) cause the mean to change by that constant 
B) not change the mean at all because the same constant was added to or subtracted from each score 
A) cause the mean to change by that constant 
B) not change the mean at all because the same constant was added to or subtracted from each score

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

The sample size is in the denominator of the calculation of a sample mean.

Accepted Answer

A) True 
 B)False

Question 16

The ________ is the middle value in a distribution of scores that are listed in numeric order.

Accepted Answer

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

Question 17

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 18

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

Accepted Answer

A) True 
 B)False

Question 19

The mode can be used to describe modal distributions.

Accepted Answer

A) True 
 B)False

Question 20

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

Three measures of central tendency are the mean,median,and range.

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 .

A professor grades 120 research papers and reports that the average score was an 80%.What do we know about the sum of the differences of these 120 scores from their mean of 80%?

A skewed distribution tends to pull the median,but not the mean,toward outliers in the data.

The mode is the middle score in a distribution.

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

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?

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

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 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

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

Adding the same constant to each score in a distribution (or subtracting the same constant from it)will

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

The sample size is in the denominator of the calculation of a sample mean.

The ________ is the middle value in a distribution of scores that are listed in numeric order.

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?

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

The mode can be used to describe modal distributions.

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?

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

Three measures of central tendency are the mean,median,and range.

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 ________.

A professor grades 120 research papers and reports that the average score was an 80%.What do we know about the sum of the differences of these 120 scores from their mean of 80%?

A skewed distribution tends to pull the median,but not the mean,toward outliers in the data.

The mode is the middle score in a distribution.

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

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?

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

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 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

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

Adding the same constant to each score in a distribution (or subtracting the same constant from it)will

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

The sample size is in the denominator of the calculation of a sample mean.

The ________ is the middle value in a distribution of scores that are listed in numeric order.

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?

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

The mode can be used to describe modal distributions.

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?

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

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 .