Z-Scores
Flashcard
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
Standards-aligned
Wayground Content
FREE Resource
Student preview
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
What is the formula to find the Z-score for a population?
Back
z = (X - μ) / σ
3.
FLASHCARD QUESTION
Front
What does a Z-score of 0 indicate?
Back
A Z-score of 0 indicates that the data point is exactly at the mean.
4.
FLASHCARD QUESTION
Front
What does a positive Z-score indicate?
Back
A positive Z-score indicates that the data point is above the mean.
5.
FLASHCARD QUESTION
Front
What does a negative Z-score indicate?
Back
A negative Z-score indicates that the data point is below the mean.
6.
FLASHCARD QUESTION
Front
How do you calculate the Z-score for a sample?
Back
z = (X - M) / s, where M is the sample mean and s is the sample standard deviation.
Tags
CCSS.HSS.ID.A.4
7.
FLASHCARD QUESTION
Front
If the mean is 22.8 and the standard deviation is 7, what is the Z-score for x = 20?
Back
-0.4
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