z-scores and raw data
Flashcard
•
Mathematics
•
11th - 12th Grade
•
Practice Problem
•
Hard
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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 data set.
2.
FLASHCARD QUESTION
Front
How do you calculate a z-score?
Back
Z-score = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.
3.
FLASHCARD QUESTION
Front
What does a positive z-score indicate?
Back
A positive z-score indicates that the value is above the mean.
4.
FLASHCARD QUESTION
Front
What does a negative z-score indicate?
Back
A negative z-score indicates that the value is below the mean.
5.
FLASHCARD QUESTION
Front
If a student's z-score is 0, what does that mean?
Back
It means the student's score is exactly at the mean.
6.
FLASHCARD QUESTION
Front
What is the mean in a data set?
Back
The mean is the average of all data points in a set.
7.
FLASHCARD QUESTION
Front
What is the standard deviation?
Back
Standard deviation measures the amount of variation or dispersion in a set of values.
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