Question 1

z scores that fall above the mean are ______.

Accepted Answer

A) positive 
B) negative 
C) 0 
D) 1 
A) positive 
B) negative 
C) 0 
D) 1

Question 2

What two scores would divide a normal distribution such that 64.26% of the general population falls within them if the mean is 100 and the standard deviation is 15?

Accepted Answer

A) 80 to 120 
B) 85 to 115 
C) 90 to 110 
D) 75 to 125 
A) 80 to 120 
B) 85 to 115 
C) 90 to 110 
D) 75 to 125

Question 3

What is the term associated with how flat or peaked a distribution appears?

Accepted Answer

A) ogive 
B) skewness 
C) kurtosis 
D) variability 
A) ogive 
B) skewness 
C) kurtosis 
D) variability

Question 4

What percentage of scores fall on either side of the distribution?

Accepted Answer

A) 50% 
B) 68% 
C) 34% 
D) 99.5% 
A) 50% 
B) 68% 
C) 34% 
D) 99.5%

Question 5

Why are there no plus or minus signs on the z score table?

Accepted Answer

There are no plus or minus sig

Question 6

The characteristic associated with the "tails" of the normal curve is ______

Accepted Answer

A) bell-shape 
B) symmetry 
C) probability 
D) asymptotic 
A) bell-shape 
B) symmetry 
C) probability 
D) asymptotic

Question 7

With a raw score of 85,a group mean of 75,and a standard deviation of 5,what is the z score?

Accepted Answer

A) -2.0 
B) 2.5 
C) 2.0 
D) -2.5 
A) -2.0 
B) 2.5 
C) 2.0 
D) -2.5

Question 8

By multiplying the z score by 10 and adding 50,which standard score is computed?

Accepted Answer

A) IQ score 
B) t score 
C) x score 
D) z score 
A) IQ score 
B) t score 
C) x score 
D) z score

Question 9

Kurtosis is used to ______.

Accepted Answer

A) measure the central tendency of the distribution 
B) describe the shape of the distribution 
C) measure the variance in the distribution 
D) describe the range of a distribution 
A) measure the central tendency of the distribution 
B) describe the shape of the distribution 
C) measure the variance in the distribution 
D) describe the range of a distribution

Question 10

Under the normal curve,approximately what percentage of scores falls between -1 and +1 standard deviations around the mean?

Accepted Answer

A) 14% 
B) 34% 
C) 68% 
D) 95% 
A) 14% 
B) 34% 
C) 68% 
D) 95%

Question 11

In order to say that a distribution is negatively skewed,which of the following must be TRUE?

Accepted Answer

A) Right tail must be longer than the left. 
B) Left tail must be longer than the right. 
C) Both tails must be of equal length. 
D) The curve must be bell-shaped. 
A) Right tail must be longer than the left. 
B) Left tail must be longer than the right. 
C) Both tails must be of equal length. 
D) The curve must be bell-shaped.

Question 12

The normal curve is only sometimes symmetrical.

Accepted Answer

A) True 
 B)False

Question 13

Algebra allows us to determine the exact mathematical likelihood that a difference between groups is due to practice or treatment,as compared with chance or error.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is considered an extreme z score indicating a TRUE difference between groups?

Accepted Answer

A) >50% B) <5% C) 95% D) 100% A) >50% B) <5% C) 95% D) 100%

Question 15

When we want to infer from a sample to the population,what must be assumed?

Accepted Answer

A) The sample is normally distributed. 
B) The sample is large. 
C) The population is normally distributed. 
D) The population is large. 
A) The sample is normally distributed. 
B) The sample is large. 
C) The population is normally distributed. 
D) The population is large.

Question 16

Define asymptotic.

Accepted Answer

The term asymptotic refers to

Question 17

What characteristic of the normal curve deals with skewness?

Accepted Answer

A) symmetry 
B) asymptotic 
C) probability 
D) mean,median,and mode 
A) symmetry 
B) asymptotic 
C) probability 
D) mean,median,and mode

Question 18

What is a z score?

Accepted Answer

A z score is a standard score

Question 19

The normal curve has no skew.

Accepted Answer

A) True 
 B)False

Question 20

How is the z score calculated?

Accepted Answer

A) Subtract the mean from the raw score and divide this difference by the standard deviation. 
B) Subtract the mean from the raw score and divide this difference by the variance. 
C) Subtract the raw score from the mean and divide this difference by the standard deviation. 
D) Subtract the raw score from the mean and divide this difference by the variance. 
A) Subtract the mean from the raw score and divide this difference by the standard deviation. 
B) Subtract the mean from the raw score and divide this difference by the variance. 
C) Subtract the raw score from the mean and divide this difference by the standard deviation. 
D) Subtract the raw score from the mean and divide this difference by the variance.

z scores that fall above the mean are ______.

What two scores would divide a normal distribution such that 64.26% of the general population falls within them if the mean is 100 and the standard deviation is 15?

What is the term associated with how flat or peaked a distribution appears?

What percentage of scores fall on either side of the distribution?

Why are there no plus or minus signs on the z score table?

The characteristic associated with the "tails" of the normal curve is ______

With a raw score of 85,a group mean of 75,and a standard deviation of 5,what is the z score?

By multiplying the z score by 10 and adding 50,which standard score is computed?

Kurtosis is used to ______.

Under the normal curve,approximately what percentage of scores falls between -1 and +1 standard deviations around the mean?

In order to say that a distribution is negatively skewed,which of the following must be TRUE?

The normal curve is only sometimes symmetrical.

Algebra allows us to determine the exact mathematical likelihood that a difference between groups is due to practice or treatment,as compared with chance or error.

Which of the following is considered an extreme z score indicating a TRUE difference between groups?

When we want to infer from a sample to the population,what must be assumed?

Define asymptotic.

What characteristic of the normal curve deals with skewness?

What is a z score?

The normal curve has no skew.

How is the z score calculated?

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

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

z scores that fall above the mean are ______.

What two scores would divide a normal distribution such that 64.26% of the general population falls within them if the mean is 100 and the standard deviation is 15?

What is the term associated with how flat or peaked a distribution appears?

What percentage of scores fall on either side of the distribution?

Why are there no plus or minus signs on the z score table?

The characteristic associated with the "tails" of the normal curve is ______

With a raw score of 85,a group mean of 75,and a standard deviation of 5,what is the z score?

By multiplying the z score by 10 and adding 50,which standard score is computed?

Kurtosis is used to ______.

Under the normal curve,approximately what percentage of scores falls between -1 and +1 standard deviations around the mean?

In order to say that a distribution is negatively skewed,which of the following must be TRUE?

The normal curve is only sometimes symmetrical.

Algebra allows us to determine the exact mathematical likelihood that a difference between groups is due to practice or treatment,as compared with chance or error.

Which of the following is considered an extreme z score indicating a TRUE difference between groups?

When we want to infer from a sample to the population,what must be assumed?

Define asymptotic.

What characteristic of the normal curve deals with skewness?

What is a z score?

The normal curve has no skew.

How is the z score calculated?

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