Question 1

The mode is the most appropriate measure for

Accepted Answer

A)   skewed distributions
B)   flat distributions
C)   discrete data
D)   qualitative data

Question 2

Professor Jones gives a quiz in her statistics course and obtains the following 20 scores: 
  
Calculate: 
(a) the mode
(b) the median
(c) the mean

Accepted Answer

The answer of Professor Jones gives a quiz in her...

Question 3

For a symmetrical distribution of 10 scores the mean is calculated to be 32.6. Later it is learned that John's recorded score of 28 really should be a 35. Correcting this error will change the calculated value of

Accepted Answer

A)   the mean only
B)   the mean and the mode
C)   the median and the mode
D)   the mean and the median

Question 4

X8 refers to

Accepted Answer

A)   a score of 8
B)   a score 8th in magnitude among those in the distribution
C)   the 8th score in the distribution but not necessarily the 8th in magnitude
D)   the fact that there are just 8 scores in the distribution

Question 5

The mean of a distribution is 75 and the median is 72. If 20 points are subtracted from each score, the mean of this altered distribution will be

Accepted Answer

A)   75
B)   65
C)   55
D)   altered in some way, but there is insufficient information to say exactly how C

Question 6

For each of the following sets of scores, find (1) the mode, (2) the median, and (3) the mean:
(a)12, 10, 8, 19, 8,
(b)14, 12, 17, 23, 
(c)11, 6, 10, 11, 11, 11.

Accepted Answer

(a) <img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> <br>(b) ...

Question 7

The deviations about the mean for four out of a sample of five scores are: -3, +2, +6, -1. The fifth deviation must be

Accepted Answer

A)   -4
B)   +3
C)   -2
D)   +5 A

Question 8

Which measure of central tendency would you use with the following distribution of scores? Explain.

Accepted Answer

Median; we...

Question 9

In the series of scores: 4, 4, 5, 7, the number 4.5 is

Accepted Answer

A)   the mean
B)   the mode
C)   the median
D)   none of the above

Question 10

Several situations tend to make the median a more attractive choice than it might otherwise be. Which, among those described below, does not add to its attractiveness?

Accepted Answer

A)   the distribution is open-ended
B)   the distribution is skewed
C)   a measure is wanted which reflects the total of the scores
D)   there are several scores which lie substantially to one side of the bulk of the scores

Question 11

In the series of scores: 4, 4, 5, 7, the number 4 is

Accepted Answer

A)   the mean
B)   the mode
C)   the median
D)   none of the above

Question 12

The measure of central tendency that may be considered as the "balance point" of the distribution is the

Accepted Answer

A)   mean
B)   median
C)   mode
D)   none of the above

Question 13

The highest point of a frequency curve is most closely associated with

Accepted Answer

A)   the mean
B)   the median
C)   the mode
D)   P50

Question 14

Measures of central tendency differ in their resistance to the effect of sampling fluctuation. From most resistant to least resistant, the order is

Accepted Answer

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

Question 15

The median is

Accepted Answer

A)   the score falling halfway between the lowest and highest scores in the distribution
B)   the score point below which half of the cases fall
C)   either (a)  or (b)  above; they mean the same thing
D)   neither (a)  nor (b)  above

Question 16

What shape would you predict for each of the following distributions:
(a)   
(b)  (c)

Accepted Answer

(a)negatively skewed...

Question 17

If one score in a distribution is changed to another value, it is certain that, according to raw score calculation,

Accepted Answer

A)   the mean has changed
B)   the median has changed
C)   the mode has changed
D)   all these measures have changed A

Question 18

(a) For the sample of scores: 7, 3, 5, 3, 3, show that  . 
(b) State what  means in words. To what property of the mean is it related?

Accepted Answer

(a)

(b) the su...

Question 19

In the series of scores: 4, 4, 5, 7, the number 5 is

Accepted Answer

A)   the mean
B)   the mode
C)   the median
D)   none of the above

Question 20

In constructing a frequency distribution, a score belonging in the top class interval is inadvertently omitted. Which measure(s)  might not be affected?

Accepted Answer

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

Exam 4: Central Tendency

The mode is the most appropriate measure for

Correct AnswerverifiedShow Answer

Professor Jones gives a quiz in her statistics course and obtains the following 20 scores: Calculate: (a) the mode (b) the median (c) the mean

Correct AnswerverifiedShow Answer

For a symmetrical distribution of 10 scores the mean is calculated to be 32.6. Later it is learned that John's recorded score of 28 really should be a 35. Correcting this error will change the calculated value of

Correct AnswerverifiedShow Answer

X8 refers to

Correct AnswerverifiedShow Answer

The mean of a distribution is 75 and the median is 72. If 20 points are subtracted from each score, the mean of this altered distribution will be

Correct AnswerverifiedC

For each of the following sets of scores, find (1) the mode, (2) the median, and (3) the mean: (a)12, 10, 8, 19, 8, (b)14, 12, 17, 23, (c)11, 6, 10, 11, 11, 11.

Correct Answerverified(a) (b) ...View AnswerShow Answer

The deviations about the mean for four out of a sample of five scores are: -3, +2, +6, -1. The fifth deviation must be

Correct AnswerverifiedA

Which measure of central tendency would you use with the following distribution of scores? Explain.

Correct AnswerverifiedMedian; we...View AnswerShow Answer

In the series of scores: 4, 4, 5, 7, the number 4.5 is

Correct AnswerverifiedShow Answer

Several situations tend to make the median a more attractive choice than it might otherwise be. Which, among those described below, does not add to its attractiveness?

Correct AnswerverifiedShow Answer

In the series of scores: 4, 4, 5, 7, the number 4 is

Correct AnswerverifiedShow Answer

The measure of central tendency that may be considered as the "balance point" of the distribution is the

Correct AnswerverifiedShow Answer

The highest point of a frequency curve is most closely associated with

Correct AnswerverifiedShow Answer

Measures of central tendency differ in their resistance to the effect of sampling fluctuation. From most resistant to least resistant, the order is

Correct AnswerverifiedShow Answer

The median is

Correct AnswerverifiedShow Answer

What shape would you predict for each of the following distributions: (a) (b) (c)

Correct Answerverified(a)negatively skewed...View AnswerShow Answer

If one score in a distribution is changed to another value, it is certain that, according to raw score calculation,

Correct AnswerverifiedA

(a) For the sample of scores: 7, 3, 5, 3, 3, show that . (b) State what means in words. To what property of the mean is it related?

Correct Answerverified(a) (b) the su...View AnswerShow Answer

In the series of scores: 4, 4, 5, 7, the number 5 is

Correct AnswerverifiedShow Answer

In constructing a frequency distribution, a score belonging in the top class interval is inadvertently omitted. Which measure(s) might not be affected?

Correct AnswerverifiedShow Answer

Themode is the most appropriate measure for

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X₈ refers to

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Median; we...
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(a)negatively skewed...
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A

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(a)

(b) the su...
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