Distribution Curves Flashcards

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1
Q

why would a distribution curve have a positive skew?

A

if the mode is a lower number than the mean

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2
Q

why would a distribution curve have a negative skew?

A

when the mode is a higher number than the mean

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3
Q

what is a normal distribution curve (bell curve)

A

when the mean, median and mode are in line with one another

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4
Q

what percentage of the data falls within 1 standard deviation of the mean in a normal curve?

A

68%

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5
Q

what percentage of data falls within 2 standard deviations of the mean in a normal curve?

A

95%

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6
Q

what percentage of data falls within 3 standard deviations of the mean on a normal curve?

A

99.7%

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