Question 1

On a normal distribution the mean always lies to the right of the mode.

Accepted Answer

A) True 
 B)False

Question 2

A z score of + 1 corresponds with a raw score of

Accepted Answer

A)  200 
B)  400 
C)  500 
D)  600 
A)  200 
B)  400 
C)  500 
D)  600

Question 3

Percentage of scores falling between z's of -.80 and +.80

Accepted Answer

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

Question 4

The 84th percentile corresponds with a raw score of

Accepted Answer

A)  250 
B)  500 
C)  600 
D)  800 
A)  250 
B)  500 
C)  600 
D)  800

Question 5

The normal curve is

Accepted Answer

A)  symmetrical 
B)  unimodal 
C)  asymptotic to the abscissa 
D)  all of these 
A)  symmetrical 
B)  unimodal 
C)  asymptotic to the abscissa 
D)  all of these

Question 6

A positive z score always results when the raw score is greater than the mean.

Accepted Answer

A) True 
 B)False

Question 7

Percentiles always indicate

Accepted Answer

A)  the percentage of cases falling below a given point 
B)  the percentage of cases falling above a given point 
C)  the percentage of cases falling between a given z score and the mean 
D)  the percentage of cases falling above a given z score 
A)  the percentage of cases falling below a given point 
B)  the percentage of cases falling above a given point 
C)  the percentage of cases falling between a given z score and the mean 
D)  the percentage of cases falling above a given z score

Question 8

When a given point under the normal curve is 1.54 standard deviation units above the mean, then

Accepted Answer

A)  its percentile is 15.4 
B)  its percentile is 1.54 
C)  its z score is +1.54 
D)  both a and c, but not b 
A)  its percentile is 15.4 
B)  its percentile is 1.54 
C)  its z score is +1.54 
D)  both a and c, but not b

Question 9

Find the percentiles for the following: the mean score on a test of psychopathy among a group of incarcerated inmates is 50, with a standard deviation of 10. Assume a normal distribution, and find the Percentile for the following psychopathy scores:
-68

Accepted Answer

96.41 or 9

Question 10

Assume a normal distribution of height scores, with a mean of 68" and a standard deviation of 3", then

Accepted Answer

A)  68% of the cases must fall between 65" and 71" 
B)  50% of the cases must fall below 68" 
C)  68% of the cases must fall at exactly 68" 
D)  a and b, but not c 
A)  68% of the cases must fall between 65" and 71" 
B)  50% of the cases must fall below 68" 
C)  68% of the cases must fall at exactly 68" 
D)  a and b, but not c

Question 11

The higher a given point on the ordinate of the normal curve, then

Accepted Answer

A)  the higher the frequency of scores below that point 
B)  the lower the frequency of scores below that point 
C)  the closer the point is to the abscissa 
D)  the higher the resulting raw score 
A)  the higher the frequency of scores below that point 
B)  the lower the frequency of scores below that point 
C)  the closer the point is to the abscissa 
D)  the higher the resulting raw score

Question 12

Percentage of scores falling between z's of -.53 and +.84

Accepted Answer

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

Question 13

The mean of the z score distribution must always equal 0.

Accepted Answer

A) True 
 B)False

Question 14

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
-90 lbs.

Accepted Answer

3.44 or 3r

Question 15

A negative z score means that

Accepted Answer

A)  the raw score is below the mean 
B)  the mean is below the raw score 
C)  the distribution is skewed left 
D)  none of these, since it is impossible to get a negative z score 
A)  the raw score is below the mean 
B)  the mean is below the raw score 
C)  the distribution is skewed left 
D)  none of these, since it is impossible to get a negative z score

On a normal distribution the mean always lies to the right of the mode.

A z score of + 1 corresponds with a raw score of

Percentage of scores falling between z's of -.80 and +.80

The 84th percentile corresponds with a raw score of

The normal curve is

A positive z score always results when the raw score is greater than the mean.

Percentiles always indicate

When a given point under the normal curve is 1.54 standard deviation units above the mean, then

Find the percentiles for the following: the mean score on a test of psychopathy among a group of incarcerated inmates is 50, with a standard deviation of 10. Assume a normal distribution, and find the Percentile for the following psychopathy scores: -68

Assume a normal distribution of height scores, with a mean of 68" and a standard deviation of 3", then

The higher a given point on the ordinate of the normal curve, then

Percentage of scores falling between z's of -.53 and +.84

The mean of the z score distribution must always equal 0.

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 -90 lbs.

A negative z score means that

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

On a normal distribution the mean always lies to the right of the mode.

A z score of + 1 corresponds with a raw score of

Percentage of scores falling between z's of -.80 and +.80

The 84th percentile corresponds with a raw score of

The normal curve is

A positive z score always results when the raw score is greater than the mean.

Percentiles always indicate

When a given point under the normal curve is 1.54 standard deviation units above the mean, then

Find the percentiles for the following: the mean score on a test of psychopathy among a group of incarcerated inmates is 50, with a standard deviation of 10. Assume a normal distribution, and find the Percentile for the following psychopathy scores: -68

Assume a normal distribution of height scores, with a mean of 68" and a standard deviation of 3", then

The higher a given point on the ordinate of the normal curve, then

Percentage of scores falling between z's of -.53 and +.84

The mean of the z score distribution must always equal 0.

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 -90 lbs.

A negative z score means that

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