Question 1

T scores are directly analogous to standard scores,but instead of having a mean of 0 and a standard deviation of 1.00,they have a mean of 50.00 and a standard deviation of 10.00.

Accepted Answer

A) True 
 B)False  True

Question 2

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

Accepted Answer

A)  median frequency
B)  percentile rank
C)  relative frequency
D)  standard scoreE) A) and B)
F) A) and C)

Question 3

If your professor tells you that the mean of the class was 70 and the standard deviation was 2 what is the variance?

Accepted Answer

A)  6
B)  8
C)  4
D)  Cannot be determinedE) A) and D)
F) A) and B)

Question 4

In what sense are percentile ranks and standard scores similar to each other?

Accepted Answer

Percentile ranks and standard scores are measures used to identify the location of a specified score within a set of scores.They represent an individual's performance on some variable relative to some group of individuals.They do not convey performance in an absolute sense.

Question 5

Percentiles are used in standardized testing such as the SAT.

Accepted Answer

A) True 
 B)False

Question 6

If your boss wants you to compare how well your company is doing compared to another company in customer Satisfaction and you scored a 90 and your competitor a 88 can you really say your customers are more satisfied?

Accepted Answer

A)  Yes
B)  No,the mean of the distributions needs to be determined
C)  No,the SD of the distributions needs to be determined
D)  Both b & cE) None of the above
F) A) and B)

Question 7

Based on the Applications to the Analysis of Social Problems section of Chapter 4,a variant of the standard scores formula may be calculated using the _____ and _____ instead of the mean and standard deviation,respectively.

Accepted Answer

A)  median;range
B)  median;median of absolute deviations
C)  mode;interquartile range
D)  mode;varianceE) C) and D)
F) B) and D)

Question 8

The mean of a set of standard scores for a given distribution is _____.

Accepted Answer

A)  100
B)  50
C)  1
D)  0E) B) and D)
F) A) and C)

Question 9

The scores below represent the results of an in-class quiz worth 10 points.
What is the cumulative frequency associated with a score of 6?

Accepted Answer

A)  2
B)  5
C)  7
D)  13E) None of the above
F) B) and D)

Question 10

A set of scores that is platykurtic will still be platykurtic after they have been converted to standard scores.

Accepted Answer

A) True 
 B)False

Question 11

A set of scores that is positively skewed will become normally distributed after they have been converted to standard scores.

Accepted Answer

A) True 
 B)False

Question 12

It is always the case that _____ of the scores in a normal distribution occur above the mean and _____ of the scores in a normal distribution occur below the mean.

Accepted Answer

A)  .50;.50
B)  .75;.25
C)  all;none
D)  .25;.75E) B) and C)
F) A) and D)

Question 13

In a normal distribution,approximately _____ of all scores fall between standard scores of -3 and +3.

Accepted Answer

A)  50%
B)  68%
C)  95%
D)  99%E) A) and C)
F) C) and D)

Question 14

List four characteristics shared by all normal distributions.

Accepted Answer

All normal distributions are symmetrical...

Question 15

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

Accepted Answer

A)  median frequency
B)  percentile rank
C)  relative frequency
D)  standard scoreE) A) and C)
F) None of the above

Question 16

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows:
= 85,s2 = 36.What is Nancy's z score?

Accepted Answer

A)  .14
B)  -.14
C)  .83
D)  -.83E) A) and D)
F) A) and C)

Question 17

How does the standardization of a set of scores affect the basic shape of the distribution?

Accepted Answer

The process of standardizing scores does not change the basic shape of the distribution.Standardization affects the central tendency and the variability of the scores,but not the skewness or kurtosis of the scores.

Question 18

In a normal distribution,over 99% of all scores fall between standard scores of -3 and +3.

Accepted Answer

A) True 
 B)False

Question 19

The percentage of scores in the distribution that occur at or below a given value,X,is the _____ of that value.

Accepted Answer

A)  standard score
B)  percentile rank
C)  percentile
D)  rankE) A) and C)
F) A) and B)

Question 20

The score value corresponding to a given percentile rank is referred to as a _____.

Accepted Answer

A)  z-score
B)  percentage
C)  percentile
D)  none of theseE) C) and D)
F) None of the above

Exam 4: Percentiles percentile Ranks standard Scores and the Normal Distribution

T scores are directly analogous to standard scores,but instead of having a mean of 0 and a standard deviation of 1.00,they have a mean of 50.00 and a standard deviation of 10.00.

Correct AnswerverifiedTrue

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

Correct AnswerverifiedShow Answer

If your professor tells you that the mean of the class was 70 and the standard deviation was 2 what is the variance?

Correct AnswerverifiedShow Answer

In what sense are percentile ranks and standard scores similar to each other?

Correct AnswerverifiedPercentile ranks and standard scores are measures used to identify the location of a specified score within a set of scores.They represent an individual's performance on some variable relative to some group of individuals.They do not convey performance in an absolute sense.

Percentiles are used in standardized testing such as the SAT.

Correct AnswerverifiedShow Answer

If your boss wants you to compare how well your company is doing compared to another company in customer Satisfaction and you scored a 90 and your competitor a 88 can you really say your customers are more satisfied?

Correct AnswerverifiedShow Answer

Based on the Applications to the Analysis of Social Problems section of Chapter 4,a variant of the standard scores formula may be calculated using the _____ and _____ instead of the mean and standard deviation,respectively.

Correct AnswerverifiedShow Answer

The mean of a set of standard scores for a given distribution is _____.

Correct AnswerverifiedShow Answer

The scores below represent the results of an in-class quiz worth 10 points. What is the cumulative frequency associated with a score of 6?

Correct AnswerverifiedShow Answer

A set of scores that is platykurtic will still be platykurtic after they have been converted to standard scores.

Correct AnswerverifiedShow Answer

A set of scores that is positively skewed will become normally distributed after they have been converted to standard scores.

Correct AnswerverifiedShow Answer

It is always the case that _____ of the scores in a normal distribution occur above the mean and _____ of the scores in a normal distribution occur below the mean.

Correct AnswerverifiedShow Answer

In a normal distribution,approximately _____ of all scores fall between standard scores of -3 and +3.

Correct AnswerverifiedShow Answer

List four characteristics shared by all normal distributions.

Correct AnswerverifiedAll normal distributions are symmetrical...View AnswerShow Answer

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

Correct AnswerverifiedShow Answer

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85,s2 = 36.What is Nancy's z score?

Correct AnswerverifiedShow Answer

How does the standardization of a set of scores affect the basic shape of the distribution?

Correct AnswerverifiedThe process of standardizing scores does not change the basic shape of the distribution.Standardization affects the central tendency and the variability of the scores,but not the skewness or kurtosis of the scores.

In a normal distribution,over 99% of all scores fall between standard scores of -3 and +3.

Correct AnswerverifiedShow Answer

The percentage of scores in the distribution that occur at or below a given value,X,is the _____ of that value.

Correct AnswerverifiedShow Answer

The score value corresponding to a given percentile rank is referred to as a _____.

Correct AnswerverifiedShow Answer

Correct Answer
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Percentile ranks and standard scores are measures used to identify the location of a specified score within a set of scores.They represent an individual's performance on some variable relative to some group of individuals.They do not convey performance in an absolute sense.

Correct Answer
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Correct Answer
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Based on the Applications to the Analysis of Social Problems section of Chapter 4,a variant of the standard scores formula may be calculated using the _ and _ instead of the mean and standard deviation,respectively.

Correct Answer
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Correct Answer
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It is always the case that _ of the scores in a normal distribution occur above the mean and _ of the scores in a normal distribution occur below the mean.

Correct Answer
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Correct Answer
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Correct Answer
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All normal distributions are symmetrical...
View Answer

Correct Answer
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An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85,s² = 36.What is Nancy's z score?

Correct Answer
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Correct Answer
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The process of standardizing scores does not change the basic shape of the distribution.Standardization affects the central tendency and the variability of the scores,but not the skewness or kurtosis of the scores.

Correct Answer
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Correct Answer
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Correct Answer
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