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Flashcards in Stats Deck (4):
1

In a normal distribution, what percentage of observations lie within 1 standard deviation of the mean?

~68%.

2

In a normal distribution, what percentage of observations lie within 2 standard deviations from the mean?

~95%.

3

In a normal distribution, what percentage of observations lie within 3 standard deviations from the mean?

~99.7%.

4

What does standard deviation measure?

The dispersal about the mean for a whole population.