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3 cards from this section. Quick, good the night before a test.
What does standard deviation measure?
Think about how numbers can spread out from the average.
What formula is used to calculate the population standard deviation?
Remember the notation for the population: N and σ.
What is the formula for calculating sample standard deviation?
Consider N-1 when sampling from a larger population.
True or False: A larger standard deviation indicates that data points are close to the mean.
Think about what it means for numbers to cluster.
Given the data set 12, 15, 22, 30, and 34, calculate the standard deviation and interpret the meaning in the context of variation.
Don’t forget to calculate both the mean and then the variance before taking the square root.
In a dataset representing scores in a class, how would an increase in standard deviation affect grading curves?
Think about how variability influences grading thresholds.
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