Standard Deviation and Normal Distribution Flashcard

Flashcard
•
Mathematics
•
9th - 12th Grade
•
Hard
+1
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What does x̄ represent in the formula for standard deviation?
Back
x̄ represents the average of the data set.
2.
FLASHCARD QUESTION
Front
In a normal distribution, what percent of information falls within one standard deviation of the mean?
Back
68% of the information falls within one standard deviation of the mean.
Tags
CCSS.HSS.ID.A.4
3.
FLASHCARD QUESTION
Front
What is the standard deviation of scores in a normal distribution where 68% of scores fall between 50 and 80?
Back
The standard deviation is 15.
4.
FLASHCARD QUESTION
Front
What does the symbol 'μ' represent in statistics?
Back
μ represents the mean of a data set.
Tags
CCSS.6.SP.A.3
5.
FLASHCARD QUESTION
Front
How is standard deviation calculated?
Back
Standard deviation is calculated as the square root of the variance.
6.
FLASHCARD QUESTION
Front
What is a normal distribution?
Back
A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.
7.
FLASHCARD QUESTION
Front
What is the empirical rule in statistics?
Back
The empirical rule states that for a normal distribution, approximately 68% of data falls within one standard deviation, 95% within two, and 99.7% within three standard deviations from the mean.
Tags
CCSS.HSS.ID.A.4
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