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Z-scores
Test Description: Remembering z-score facts and how to find the z-scores
Instructions: Answer all questions to get your test result.
1) What is a Z-score?
A
A completely made up concept
B
A number that tells you the percent of values within the interval
C
A number that tells you how many chickens Ms. Lowe has.
D
A number that tells you how many standard deviations from mean of set
2) How do you find the distance from the given value and the mean?
A
Add
B
Divide
C
Multiply
D
Subtract
3) It Is always the value minus the mean, NOT the mean minus the value.
A
True
B
False
4) How do you find the number of standard deviations that would fit into the distance found?
A
Add
B
Divide
C
Subtract
D
Multiply
5) The formula for z-scores is: (mean-given)/standard deviation
A
True
B
False
6) How is a z-score used?
A
To go to Disney
B
Find distance between a given value and the mean.
C
To find the area of a parallelogram.
D
To find the area or percentage between the given value and mean
7) The Wechsler IQ test have a mean of 100 with a standard deviation of 15. What is the z-score if the IQ is 121?
A
z=(121-100)/15=21/15= 1.40
B
z=( 100-100)/15= 0/15= 0
C
z=(140-100)/15=40/15= 2.67
D
z=(72-100)/15=-28/15=-1.87
8) The Wechsler IQ test have a mean of 100 with a standard deviation of 15. What is the z-score if the IQ is 100?
A
z=(140-100)/15=40/15= 2.67
B
z=( 100-100)/15= 0/15= 0
C
z=(121-100)/15=21/15= 1.40
D
z=(72-100)/15=-28/15=-1.87
9) The Wechsler IQ test have a mean of 100 with a standard deviation of 15. What is the z-score if the IQ is 72?
A
z=(72-100)/15=-28/15=-1.87
B
z=(140-100)/15=40/15= 2.67
C
z=( 100-100)/15= 0/15= 0
D
z=(121-100)/15=21/15= 1.40
10) The Wechsler IQ test have a mean of 100 with a standard deviation of 15. What is the z-score if the IQ is 140?
A
z=(72-100)/15=-28/15=-1.87
B
z=(121-100)/15=21/15= 1.40
C
z=(140-100)/15=40/15= 2.67
D
z=( 100-100)/15= 0/15= 0
*select an answer for all questions
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