Stats Ch 2.4 Measures of Variation
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Mathematics
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10th - 12th Grade
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Hard
+2
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1.
FLASHCARD QUESTION
Front
What is a measure of variability?
Back
A measure of variability quantifies the extent to which data points in a dataset differ from each other. Common measures include range, variance, and standard deviation.
Tags
CCSS.6.SP.A.3
2.
FLASHCARD QUESTION
Front
What is standard deviation?
Back
Standard deviation is a statistic that measures the dispersion of a dataset relative to its mean. A low standard deviation indicates that data points tend to be close to the mean, while a high standard deviation indicates a wider spread.
3.
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
4.
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
5.
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 than data far from the mean.
6.
FLASHCARD QUESTION
Front
What does it mean if a distribution is skewed left?
Back
A left-skewed distribution has a longer tail on the left side, indicating that there are a larger number of lower values compared to higher values.
7.
FLASHCARD QUESTION
Front
What is the formula for calculating the mean?
Back
The mean is calculated by summing all the values in a dataset and dividing by the number of values.
Tags
CCSS.6.SP.B.5C
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