Standard Deviation and Variance Review

Flashcard
•
Mathematics
•
9th - 12th Grade
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is standard deviation?
Back
Standard deviation is a measure of the amount of variation or dispersion in a set of values. It indicates how much individual data points differ from the mean of the data set.
2.
FLASHCARD QUESTION
Front
How do you calculate the standard deviation?
Back
Take the square root of the variance.
3.
FLASHCARD QUESTION
Front
What is variance?
Back
Variance is a statistical measurement that describes the spread of numbers in a data set. It is the average of the squared differences from the mean.
4.
FLASHCARD QUESTION
Front
If the standard deviation of a data set is 4, what is the variance?
Back
16 (Variance is the square of the standard deviation).
5.
FLASHCARD QUESTION
Front
Before you can begin calculating the variance, you must first:
Back
Find the mean.
6.
FLASHCARD QUESTION
Front
What is the formula for variance?
Back
Variance (σ²) = Σ (xi - μ)² / N, where xi is each value, μ is the mean, and N is the number of values.
7.
FLASHCARD QUESTION
Front
What does a high standard deviation indicate?
Back
A high standard deviation indicates that the data points are spread out over a wider range of values.
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