Z-scores Question Preview (ID: 49847)


Remembering Z-score Facts And How To Find The Z-scores. TEACHERS: click here for quick copy question ID numbers.

What is a Z-score?
a) A number that tells you how many standard deviations from mean of set
b) A completely made up concept
c) A number that tells you how many chickens Ms. Lowe has.
d) A number that tells you the percent of values within the interval

How do you find the distance from the given value and the mean?
a) Multiply
b) Add
c) Subtract
d) Divide

It Is always the value minus the mean, NOT the mean minus the value.
a) False
b) True
c)
d)

How do you find the number of standard deviations that would fit into the distance found?
a) Divide
b) Multiply
c) Add
d) Subtract

The formula for z-scores is: (mean-given)/standard deviation
a) True
b) False
c)
d)

How is a z-score used?
a) To find the area of a parallelogram.
b) Find distance between a given value and the mean.
c) To find the area or percentage between the given value and mean
d) To go to Disney

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=(72-100)/15=-28/15=-1.87
b) z=(140-100)/15=40/15= 2.67
c) z=(121-100)/15=21/15= 1.40
d) z=( 100-100)/15= 0/15= 0

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=(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

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=(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

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=( 100-100)/15= 0/15= 0
b) z=(72-100)/15=-28/15=-1.87
c) z=(140-100)/15=40/15= 2.67
d) z=(121-100)/15=21/15= 1.40

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