Z-Scores
Quiz
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Medium
Standards-aligned
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12 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is a Z-Score?
A measure of the central tendency of a data set.
A statistical measurement that indicates how many standard deviations an element is from the mean of a data set.
A method for calculating the variance of a data set.
A graphical representation of data distribution.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What does it mean if a Z-Score is greater than 2?
It means the value is more than 2 standard deviations above the mean, indicating it is significantly higher than average.
It means the value is less than 2 standard deviations below the mean, indicating it is significantly lower than average.
It means the value is exactly 2 standard deviations above the mean, indicating it is average.
It means the value is within 2 standard deviations of the mean, indicating it is typical.
Tags
CCSS.HSS.ID.A.4
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
If the mean is 100 and the standard deviation is 10, what is the Z-Score for 90?
@@z = rac{{90 - 100}}{{10}} = -1.00@@
@@z = rac{{90 - 100}}{{5}} = -2.00@@
@@z = rac{{90 - 100}}{{15}} = -0.67@@
@@z = rac{{90 - 100}}{{20}} = -0.50@@
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What does it mean if a Z-Score is less than -2?
It means the value is more than 2 standard deviations below the mean, indicating it is significantly lower than average.
It means the value is exactly at the mean.
It means the value is more than 2 standard deviations above the mean, indicating it is significantly higher than average.
It means the value is within 1 standard deviation of the mean.
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
How do you interpret a Z-Score of 1.5?
A Z-Score of 1.5 means the value is 1.5 standard deviations above the mean.
A Z-Score of 1.5 indicates the value is 1.5 units below the mean.
A Z-Score of 1.5 suggests the value is at the mean level.
A Z-Score of 1.5 represents a value that is 1.5 times the mean.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
If a data set has a mean of 200 and a standard deviation of 25, what is the Z-Score for 250?
1.00
1.50
2.00
2.50
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What does a positive Z-Score signify?
A positive Z-Score indicates that the value is above the mean.
A positive Z-Score indicates that the value is below the mean.
A positive Z-Score indicates that the value is equal to the mean.
A positive Z-Score indicates that the value is negative.
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