What is a z-score?
Authored by Suzanne Marsan
Mathematics
9th - 12th Grade
CCSS covered
Used 5+ times
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6 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the purpose of calculating a z-score?
To find the mean of a normal distribution.
To find the standard deviation of a normal distribution.
To determine the shape of a distribution.
To find the exact position of a raw score from a normal distribution.
2.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Check all that are true about a standard normal curve.
The mean is zero.
The standard deviation is zero.
The standard deviation is one.
The distribution is approximately normal.
The curve shows outliers with a star.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which z-score represents a raw score that is lower than the mean of the distribution?
z = -1.47
z = 0
z = 0.05
z = 2.35
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which z-score represents a raw score that is considered "unusual?"
z = -1.95
z = -2
z = 2.5
z = 1.95
Tags
CCSS.HSS.ID.A.4
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the z-score for a raw score of 80 from an approximately normal distribution with a mean of 76 and a standard deviation of 8.
z = -0.5
z = 0.5
z = -2
z = 2
Tags
CCSS.HSS.ID.A.4
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the z-score for a raw score of 45 from an approximately normal distribution with a mean of 57 and a standard deviation of 10.
z = -0.83
z = 0.83
z = -1.20
z = 1.20
Tags
CCSS.HSS.ID.A.4
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