Calculating z-scores
Flashcard
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Standards-aligned
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a z-score?
Back
A z-score indicates how many standard deviations an element is from the mean of a dataset.
2.
FLASHCARD QUESTION
Front
How do you calculate a z-score?
Back
Z-score = (x - mean) / standard deviation
3.
FLASHCARD QUESTION
Front
If the mean is 29.8 and the standard deviation is 7, what is the z-score for x = 20?
Back
-1.4
4.
FLASHCARD QUESTION
Front
Given the data set {23, 15, 4, 11, 1, 29, 3, 17}, what is the z-score for x = 30?
Back
1.82
5.
FLASHCARD QUESTION
Front
What does a positive z-score indicate?
Back
A positive z-score indicates that the value is above the mean.
6.
FLASHCARD QUESTION
Front
What does a negative z-score indicate?
Back
A negative z-score indicates that the value is below the mean.
7.
FLASHCARD QUESTION
Front
If the mean is 40 and the standard deviation is 1.4, what is the z-score for x = 42?
Back
1.43
Tags
CCSS.HSS.ID.A.4
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