Question 1

What percentage of scores fall within 3 standard deviations of the mean?

Accepted Answer

A) 50% 
B) 95% 
C) 68% 
D) 99.5% 
A) 50% 
B) 95% 
C) 68% 
D) 99.5%

Question 2

If a distribution has a mean of 30 and a standard deviation of 5,how many standard deviations is 60 from the mean?

Accepted Answer

A) 5 
B) 6 
C) -6 
D) 0 
A) 5 
B) 6 
C) -6 
D) 0

Question 3

Which of the following statements is TRUE of the normal curve?

Accepted Answer

A) Mean,median,and mode are different. 
B) Mean,median,and mode are the same. 
C) Mean and median are the same,but the mode is different. 
D) Mean and mode are the same,but the median is different. 
A) Mean,median,and mode are different. 
B) Mean,median,and mode are the same. 
C) Mean and median are the same,but the mode is different. 
D) Mean and mode are the same,but the median is different.

Question 4

What types of values are most likely to be seen in a normal distribution?

Accepted Answer

A) values very close to the mean 
B) values very far from the mean 
C) very high values 
D) very low values 
A) values very close to the mean 
B) values very far from the mean 
C) very high values 
D) very low values

Question 5

z scores that fall below the mean are ______.

Accepted Answer

A) positive 
B) negative 
C) either positive or negative 
D) 0 
A) positive 
B) negative 
C) either positive or negative 
D) 0

Question 6

If you know the z score,standard deviation(s),and mean (M),what formula would you use to compute the raw score (X)?

Accepted Answer

A) X = (z + s)÷ M 
B) M = z(s)+ X 
C) X = z(s)+ M 
D) z = (M - X)÷ s 
A) X = (z + s)÷ M 
B) M = z(s)+ X 
C) X = z(s)+ M 
D) z = (M - X)÷ s

Question 7

What does a z score of -4 mean?

Accepted Answer

A z score of -4 means that the

Question 8

The entire normal curve contains ______ of scores.

Accepted Answer

A) 25% 
B) 50% 
C) 99.9% 
D) 100% 
A) 25% 
B) 50% 
C) 99.9% 
D) 100%

Question 9

The percentages or areas under the normal curve can be interpreted as probabilities.

Accepted Answer

A) True 
 B)False

Question 10

Are distributions always normal?

Accepted Answer

No,some distributions are not

Question 11

A z score that falls below the mean is ______.

Accepted Answer

A) positive 
B) equal to the mode 
C) negative 
D) in the upper half of the distribution 
A) positive 
B) equal to the mode 
C) negative 
D) in the upper half of the distribution

Question 12

What is another name for the normal curve?

Accepted Answer

A) asymptotic 
B) bell-shaped curve 
C) probability 
D) symmetry 
A) asymptotic 
B) bell-shaped curve 
C) probability 
D) symmetry

Question 13

When the left tail of a distribution's curve is longer the right,what is this called?

Accepted Answer

A) platykurtic 
B) leptokurtic 
C) positive skew 
D) negative skew 
A) platykurtic 
B) leptokurtic 
C) positive skew 
D) negative skew

Question 14

If a distribution has a mean of 50 and a standard deviation of 5,what value would be -1 standard deviation from the mean?

Accepted Answer

A) 45 
B) 50 
C) 55 
D) 60 
A) 45 
B) 50 
C) 55 
D) 60

Question 15

Both T scores and z scores are considered what type of score?

Accepted Answer

A) standard scores 
B) error scores 
C) average scores 
D) standardized scores 
A) standard scores 
B) error scores 
C) average scores 
D) standardized scores

Question 16

What percentage of all scores fall below a z score of +1?

Accepted Answer

A) 16% 
B) 34% 
C) 50% 
D) 84% 
A) 16% 
B) 34% 
C) 50% 
D) 84%

What percentage of scores fall within 3 standard deviations of the mean?

If a distribution has a mean of 30 and a standard deviation of 5,how many standard deviations is 60 from the mean?

Which of the following statements is TRUE of the normal curve?

What types of values are most likely to be seen in a normal distribution?

z scores that fall below the mean are ______.

If you know the z score,standard deviation(s),and mean (M),what formula would you use to compute the raw score (X)?

What does a z score of -4 mean?

The entire normal curve contains ______ of scores.

The percentages or areas under the normal curve can be interpreted as probabilities.

Are distributions always normal?

A z score that falls below the mean is ______.

What is another name for the normal curve?

When the left tail of a distribution's curve is longer the right,what is this called?

If a distribution has a mean of 50 and a standard deviation of 5,what value would be -1 standard deviation from the mean?

Both T scores and z scores are considered what type of score?

What percentage of all scores fall below a z score of +1?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Computing Correlation Coefficients: Ice Cream and Crime

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters

Exam 8: Probability and Why It Counts: Fun With a Bell-Shaped Curve

What percentage of scores fall within 3 standard deviations of the mean?

If a distribution has a mean of 30 and a standard deviation of 5,how many standard deviations is 60 from the mean?

Which of the following statements is TRUE of the normal curve?

What types of values are most likely to be seen in a normal distribution?

z scores that fall below the mean are ______.

If you know the z score,standard deviation(s),and mean (M),what formula would you use to compute the raw score (X)?

What does a z score of -4 mean?

The entire normal curve contains ______ of scores.

The percentages or areas under the normal curve can be interpreted as probabilities.

Are distributions always normal?

A z score that falls below the mean is ______.

What is another name for the normal curve?

When the left tail of a distribution's curve is longer the right,what is this called?

If a distribution has a mean of 50 and a standard deviation of 5,what value would be -1 standard deviation from the mean?

Both T scores and z scores are considered what type of score?

What percentage of all scores fall below a z score of +1?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Computing Correlation Coefficients: Ice Cream and Crime

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters