Alg review # 1: measures of center/variation/normal distribution
Flashcard
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Mathematics
•
11th Grade
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the mean in a data set?
Back
The mean is the average of all the numbers in a data set, calculated by adding all the values and dividing by the number of values.
Tags
CCSS.6.SP.B.5C
2.
FLASHCARD QUESTION
Front
What does variance measure in a data set?
Back
Variance measures how far a set of numbers are spread out from their average value. It is the average of the squared differences from the mean.
3.
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 is the square root of the variance.
4.
FLASHCARD QUESTION
Front
What is the first quartile (Q1)?
Back
The first quartile (Q1) is the median of the lower half of a data set, representing the 25th percentile.
Tags
CCSS.6.SP.B.5C
5.
FLASHCARD QUESTION
Front
What percentage of data falls within one standard deviation of the mean in a normal distribution?
Back
Approximately 68% of the data falls within one standard deviation of the mean in a normal distribution.
Tags
CCSS.HSS.ID.A.4
6.
FLASHCARD QUESTION
Front
What percentage of data falls within two standard deviations of the mean in a normal distribution?
Back
Approximately 95% of the data falls within two standard deviations of the mean in a normal distribution.
Tags
CCSS.HSS.ID.A.4
7.
FLASHCARD QUESTION
Front
What is the empirical rule in statistics?
Back
The empirical rule states that for a normal distribution, about 68% of the 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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