Practice with Z scores
Flashcard
•
Mathematics
•
12th Grade
•
Hard
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 is a statistical measurement that describes a value's relationship to the mean of a group of values, expressed in terms of standard deviations from the mean.
2.
FLASHCARD QUESTION
Front
How do you calculate a Z-score?
Back
Z = (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
What is the significance of a Z-score of 0?
Back
A Z-score of 0 indicates that the value is exactly equal to the mean.
6.
FLASHCARD QUESTION
Front
What percentage of data falls within 1 standard deviation of the mean in a normal distribution?
Back
Approximately 68% of the data falls within 1 standard deviation of the mean.
7.
FLASHCARD QUESTION
Front
What percentage of data falls within 2 standard deviations of the mean in a normal distribution?
Back
Approximately 95% of the data falls within 2 standard deviations of the mean.
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