Question 1

The larger the absolute value of the z score (regardless of its sign), then

Accepted Answer

A)  the higher its equivalent raw score 
B)  the lower its equivalent raw score 
C)  the further it is from the mean 
D)  the closer its equivalent raw score must be to the mean 
A)  the higher its equivalent raw score 
B)  the lower its equivalent raw score 
C)  the further it is from the mean 
D)  the closer its equivalent raw score must be to the mean

Question 2

Anytime a z score yields a percentile which is greater than 50, then

Accepted Answer

A)  the z score must be positive 
B)  the raw score must be higher than the mean 
C)  the z score must be greater than 0 
D)  all of these 
A)  the z score must be positive 
B)  the raw score must be higher than the mean 
C)  the z score must be greater than 0 
D)  all of these

Question 3

Between z scores of + 3 over 99% of the cases will be found.

Accepted Answer

A) True 
 B)False

Question 4

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores
-115 lbs.

Accepted Answer

38.21 or 3

Question 5

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores
-165 lbs.

Accepted Answer

99.68 or 1

Question 6

Under the normal curve, if a given raw score falls at the 84th percentile, then its equivalent z score must be equal to

Accepted Answer

A)  the mean 
B)  0 
C)  + 1 
D)  + 2 
A)  the mean 
B)  0 
C)  + 1 
D)  + 2

Question 7

Under the normal curve, any percentile of less than 50 must correspond to a

Accepted Answer

A)  negative z score 
B)  raw score of less than 50 
C)  z score of less than 1 
D)  z score of 0 
A)  negative z score 
B)  raw score of less than 50 
C)  z score of less than 1 
D)  z score of 0

Question 8

The creation of the normal curve concept is popularly credited to

Accepted Answer

A)  Blaise Pascal 
B)  Henry Gossett 
C)  Sir Bryant McKenna 
D)  Karl Gauss 
A)  Blaise Pascal 
B)  Henry Gossett 
C)  Sir Bryant McKenna 
D)  Karl Gauss

Question 9

Under the normal curve, the relationship between a specific z score and the percentage of cases falling between it and the mean

Accepted Answer

A)  depends on the size of the standard deviation 
B)  depends on the value of the mean 
C)  depends on the value of the raw score 
D)  is a constant 
A)  depends on the size of the standard deviation 
B)  depends on the value of the mean 
C)  depends on the value of the raw score 
D)  is a constant

Question 10

Percentage of scores falling between z's of -.15 and -.44

Accepted Answer

The answer of Percentage of scores falling between z's of...

Question 11

The 49th percentile must be below a raw score of

Accepted Answer

A)  500 
B)  400 
C)  300 
D)  200 
A)  500 
B)  400 
C)  300 
D)  200

Question 12

Percentage of scores falling above a z of -.67

Accepted Answer

The answer of Percentage of scores falling above a z...

Question 13

For a z score of 1.35 the z score table indicates a percentage value of 41.15. This means that

Accepted Answer

A)  41.15% of the cases fell below a z score of +1.35 
B)  41.15% of the cases fell above a z score of +1.35 
C)  41.15% of the cases fell between z scores of +1.35 
D)  41.15% of the cases fell between a z score of +1.35 and the mean 
A)  41.15% of the cases fell below a z score of +1.35 
B)  41.15% of the cases fell above a z score of +1.35 
C)  41.15% of the cases fell between z scores of +1.35 
D)  41.15% of the cases fell between a z score of +1.35 and the mean

Question 14

The z score provides direct information regarding how far a given raw score is

Accepted Answer

A)  from the mean in units of standard deviation 
B)  from the mean in percentage units 
C)  from the lowest score in percentile units 
D)  from the highest score in percentile units 
A)  from the mean in units of standard deviation 
B)  from the mean in percentage units 
C)  from the lowest score in percentile units 
D)  from the highest score in percentile units

Question 15

Under the normal curve, the only point where the frequency of cases is zero is

Accepted Answer

A)  between the mean and a z score of + 1 
B)  beyond a z score of + 1 
C)  beyond a z score of + 3 
D)  none of these 
A)  between the mean and a z score of + 1 
B)  beyond a z score of + 1 
C)  beyond a z score of + 3 
D)  none of these

Question 16

Whenever the mean of a raw score distribution is less than 50, the z score must be negative.

Accepted Answer

A) True 
 B)False

Question 17

On a normal distribution with a mean of 22.50 and a standard deviation of 6.20, what percentage of cases will fall between 24 and 28?

Accepted Answer

The answer of On a normal distribution with a mean...

Question 18

The z score for any raw score may be found by

Accepted Answer

A)  subtracting the mean from the raw score and dividing by the standard deviation 
B)  subtracting the raw score from the mean and dividing by the standard deviation 
C)  subtracting the raw score from 100 and dividing by 15 
D)  none of these, since raw scores cannot be converted into z scores 
A)  subtracting the mean from the raw score and dividing by the standard deviation 
B)  subtracting the raw score from the mean and dividing by the standard deviation 
C)  subtracting the raw score from 100 and dividing by 15 
D)  none of these, since raw scores cannot be converted into z scores

Question 19

Under the normal curve, the further to the right on the abscissa, the greater the number of cases.

Accepted Answer

A) True 
 B)False

Question 20

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores
-107 lbs.

Accepted Answer

21.48 or 2

The larger the absolute value of the z score (regardless of its sign), then

Anytime a z score yields a percentile which is greater than 50, then

Between z scores of + 3 over 99% of the cases will be found.

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores -115 lbs.

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores -165 lbs.

Under the normal curve, if a given raw score falls at the 84th percentile, then its equivalent z score must be equal to

Under the normal curve, any percentile of less than 50 must correspond to a

The creation of the normal curve concept is popularly credited to

Under the normal curve, the relationship between a specific z score and the percentage of cases falling between it and the mean

Percentage of scores falling between z's of -.15 and -.44

The 49th percentile must be below a raw score of

Percentage of scores falling above a z of -.67

For a z score of 1.35 the z score table indicates a percentage value of 41.15. This means that

The z score provides direct information regarding how far a given raw score is

Under the normal curve, the only point where the frequency of cases is zero is

Whenever the mean of a raw score distribution is less than 50, the z score must be negative.

On a normal distribution with a mean of 22.50 and a standard deviation of 6.20, what percentage of cases will fall between 24 and 28?

The z score for any raw score may be found by

Under the normal curve, the further to the right on the abscissa, the greater the number of cases.

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores -107 lbs.

Introduction to Statistics

Percentages, Graphs and Measures of Central Tendency

Measures of Variability

Z Scores, T Scores and Other Normal Curve Transformations

Probability

Statistics and Parameters

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters

Exam 4: The Normal Curve and Z Score

The larger the absolute value of the z score (regardless of its sign), then

Anytime a z score yields a percentile which is greater than 50, then

Between z scores of + 3 over 99% of the cases will be found.

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores -115 lbs.

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores -165 lbs.

Under the normal curve, if a given raw score falls at the 84th percentile, then its equivalent z score must be equal to

Under the normal curve, any percentile of less than 50 must correspond to a

The creation of the normal curve concept is popularly credited to

Under the normal curve, the relationship between a specific z score and the percentage of cases falling between it and the mean

Percentage of scores falling between z's of -.15 and -.44

The 49th percentile must be below a raw score of

Percentage of scores falling above a z of -.67

For a z score of 1.35 the z score table indicates a percentage value of 41.15. This means that

The z score provides direct information regarding how far a given raw score is

Under the normal curve, the only point where the frequency of cases is zero is

Whenever the mean of a raw score distribution is less than 50, the z score must be negative.

On a normal distribution with a mean of 22.50 and a standard deviation of 6.20, what percentage of cases will fall between 24 and 28?

The z score for any raw score may be found by

Under the normal curve, the further to the right on the abscissa, the greater the number of cases.

The mean weight among a group of female high school seniors is 120 lbs., with a standard deviation of 16.49 lbs. Assuming a normal distribution, find the percentiles for the following weight scores -107 lbs.

Introduction to Statistics

Percentages, Graphs and Measures of Central Tendency

Measures of Variability

Z Scores, T Scores and Other Normal Curve Transformations

Probability

Statistics and Parameters

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters