Question 1

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 2

Define asymptotic.

Accepted Answer

The term asymptotic refers to

Question 3

The normal curve is only sometimes symmetrical.

Accepted Answer

A) True 
 B)False

Question 4

If a distribution has a mean of 25 and a standard deviation of 2, what value would be −4 standard deviations from the mean?

Accepted Answer

A) 17 
B) 14 
C) 25 
D) 33 
A) 17 
B) 14 
C) 25 
D) 33

Question 5

What are three characteristics of a normal curve?

Accepted Answer

A normal curve has the three f

Question 6

If a distribution has a mean of 100 and a standard deviation of 15, what value would be +2 standard deviations from the mean?

Accepted Answer

A) 70 
B) 85 
C) 115 
D) 130 
A) 70 
B) 85 
C) 115 
D) 130

Question 7

If I flip a coin 10 times, how many possible combinations or outcomes could I have?

Accepted Answer

A) 10² 
B) 2¹⁰ 
C) 10¹⁰ 
D) 2² 
A) 10² 
B) 2¹⁰ 
C) 10¹⁰ 
D) 2²

Question 8

What is the term associated with the lack of symmetry in a distribution?

Accepted Answer

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

Question 9

Which of the following is a characteristic 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 10

In a distribution with a mean of 100 and a standard deviation of 15, what is the probability that a score will be 115 or higher?

Accepted Answer

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

Question 11

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 12

The normal curve has no skew.

Accepted Answer

A) True 
 B)False

Question 13

Rank the order of the following z scores in terms of distance from the mean: +2, −3, −1, +1, and 0.

Accepted Answer

The following z scores are ran

Question 14

Why do we use standard scores?

Accepted Answer

We use standard scor

Question 15

What type of standard score has M = 0 and SD = 1?

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 16

What is a z score?

Accepted Answer

A z score is a standard score

Question 17

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 18

What is the basis for the normal curve?

Accepted Answer

A) mean 
B) asymptotic 
C) probability 
D) symmetry 
A) mean 
B) asymptotic 
C) probability 
D) symmetry

Question 19

What is the t score for a z score of −1?

Accepted Answer

A) 10 
B) 40 
C) 50 
D) 60 
A) 10 
B) 40 
C) 50 
D) 60

Question 20

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

Exam 8: Are Your Curves Normal Probability and Why It Counts

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

Define asymptotic.

The normal curve is only sometimes symmetrical.

If a distribution has a mean of 25 and a standard deviation of 2, what value would be −4 standard deviations from the mean?

What are three characteristics of a normal curve?

If a distribution has a mean of 100 and a standard deviation of 15, what value would be +2 standard deviations from the mean?

If I flip a coin 10 times, how many possible combinations or outcomes could I have?

What is the term associated with the lack of symmetry in a distribution?

Which of the following is a characteristic of the normal curve?

In a distribution with a mean of 100 and a standard deviation of 15, what is the probability that a score will be 115 or higher?

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.

The normal curve has no skew.

Rank the order of the following z scores in terms of distance from the mean: +2, −3, −1, +1, and 0.

Why do we use standard scores?

What type of standard score has M = 0 and SD = 1?

What is a z score?

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

What is the basis for the normal curve?

What is the t score for a z score of −1?

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?

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