Question 1

In a normal distribution,50% of all scores fall between standard scores of -1 and +1.

Accepted Answer

A) True 
 B)False

Question 2

If you want to compare scores for example your math score and score on your psychology exam you should_____.

Accepted Answer

A) Convert them into a standard score 
B) Convert them into a Z-score 
C) Determine the means of the class 
D) Both a & b

Question 3

Approximately what proportion of a normal distribution lies between the z scores of +.66 and +1.55?

Accepted Answer

A) 57% 
B) 63% 
C) 68% 
D) 32%

Question 4

A distribution in which the mean is 3.00 and the median and mode are 3 is____________________.

Accepted Answer

The answer of A distribution in which the mean is...

Question 5

The score value corresponding to a percentile rank of 60 is referred to as the 60th percentile.

Accepted Answer

A) True 
 B)False

Question 6

Janet received an 80 on her English exam and a 50 on her chemistry exam.The
Mean for the class in English was 78 SD=2 and the mean for the chemistry exam was 48 and SD = 4.Which exam did Janet to better on?

Accepted Answer

The answer of Janet received an 80 on her English...

Question 7

An instructor has given his final exam and scores that are normally distributed.Nancy scores a 90 and Ronald scores a 75.The class mean on the exam was 85 and the standard deviation was 36.What is Ronald's z score?

Accepted Answer

A) 1.67 
B) -1.67 
C) 0.28 
D) -0.28

Question 8

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.John says he sleeps 10 hours a day.What is his standard score?

Accepted Answer

A) 5.5 
B) 4.5 
C) 2.5 
D) None of these

Question 9

What is a z score?

Accepted Answer

The answer of What is a z score?...

Question 10

A z score of _____ represents a raw score with a higher frequency than a standard score of _____.

Accepted Answer

A) -2.0;1.5 
B) 3.0;-.75 
C) 1.65;1.50 
D) -.50;2.2

Question 11

One important use of standard scores is to compare scores on distributions that have different _____ and _____.

Accepted Answer

A) medians and IQRs 
B) standard deviations and variances 
C) means and standard deviations 
D) none of these

Question 12

In all normal distributions,the mean,the median,and the mode are all:

Accepted Answer

A) unequal to each other 
B) standardized to 1.00 
C) evenly distributed 
D) equal to each other

Question 13

A percentile rank is an interval measure of relative standing.

Accepted Answer

A) True 
 B)False

Question 14

Not all normal distributions are symmetrical about the mean.

Accepted Answer

A) True 
 B)False

Question 15

A standard score of 0 indicates that the original score is equal to the standard deviation.

Accepted Answer

A) True 
 B)False

Question 16

The average family watches 40 hours of TV a week and uses the computer about 80 hours a week.Based on this information we know that the average family spends 50% more time on the computer.

Accepted Answer

A) True 
 B)False

Question 17

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _____ is _____.

Accepted Answer

A) percentile;75 
B) value;75 
C) score;75% 
D) percentile;25

Question 18

What does is mean if you scored in the 80^th percentile on your psychology test?

Accepted Answer

The answer of What does is mean if you scored...

Question 19

Knowing that a set of scores approximates a normal distribution allows us to make probability statements with respect to those scores,given that we know the mean and standard deviation.

Accepted Answer

A) True 
 B)False

Question 20

Z-scores are based on distributions that are skewed.

Accepted Answer

A) True 
 B)False

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

In a normal distribution,50% of all scores fall between standard scores of -1 and +1.

If you want to compare scores for example your math score and score on your psychology exam you should_____.

Approximately what proportion of a normal distribution lies between the z scores of +.66 and +1.55?

A distribution in which the mean is 3.00 and the median and mode are 3 is____________________.

The score value corresponding to a percentile rank of 60 is referred to as the 60th percentile.

Janet received an 80 on her English exam and a 50 on her chemistry exam.The Mean for the class in English was 78 SD=2 and the mean for the chemistry exam was 48 and SD = 4.Which exam did Janet to better on?

An instructor has given his final exam and scores that are normally distributed.Nancy scores a 90 and Ronald scores a 75.The class mean on the exam was 85 and the standard deviation was 36.What is Ronald's z score?

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.John says he sleeps 10 hours a day.What is his standard score?

What is a z score?

A z score of _ represents a raw score with a higher frequency than a standard score of _.

One important use of standard scores is to compare scores on distributions that have different _ and _.

In all normal distributions,the mean,the median,and the mode are all:

A percentile rank is an interval measure of relative standing.

Not all normal distributions are symmetrical about the mean.

A standard score of 0 indicates that the original score is equal to the standard deviation.

The average family watches 40 hours of TV a week and uses the computer about 80 hours a week.Based on this information we know that the average family spends 50% more time on the computer.

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _ is _.

What does is mean if you scored in the 80^th percentile on your psychology test?

Knowing that a set of scores approximates a normal distribution allows us to make probability statements with respect to those scores,given that we know the mean and standard deviation.

Z-scores are based on distributions that are skewed.

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

In a normal distribution,50% of all scores fall between standard scores of -1 and +1.

If you want to compare scores for example your math score and score on your psychology exam you should_____.

Approximately what proportion of a normal distribution lies between the z scores of +.66 and +1.55?

A distribution in which the mean is 3.00 and the median and mode are 3 is____________________.

The score value corresponding to a percentile rank of 60 is referred to as the 60th percentile.

Janet received an 80 on her English exam and a 50 on her chemistry exam.The Mean for the class in English was 78 SD=2 and the mean for the chemistry exam was 48 and SD = 4.Which exam did Janet to better on?

An instructor has given his final exam and scores that are normally distributed.Nancy scores a 90 and Ronald scores a 75.The class mean on the exam was 85 and the standard deviation was 36.What is Ronald's z score?

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.John says he sleeps 10 hours a day.What is his standard score?

What is a z score?

A z score of _____ represents a raw score with a higher frequency than a standard score of _____.

One important use of standard scores is to compare scores on distributions that have different _____ and _____.

In all normal distributions,the mean,the median,and the mode are all:

A percentile rank is an interval measure of relative standing.

Not all normal distributions are symmetrical about the mean.

A standard score of 0 indicates that the original score is equal to the standard deviation.

The average family watches 40 hours of TV a week and uses the computer about 80 hours a week.Based on this information we know that the average family spends 50% more time on the computer.

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _____ is _____.

What does is mean if you scored in the 80th percentile on your psychology test?

Knowing that a set of scores approximates a normal distribution allows us to make probability statements with respect to those scores,given that we know the mean and standard deviation.

Z-scores are based on distributions that are skewed.

A z score of _ represents a raw score with a higher frequency than a standard score of _.

One important use of standard scores is to compare scores on distributions that have different _ and _.

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _ is _.

What does is mean if you scored in the 80^th percentile on your psychology test?