- #1

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i know the variance tells us the degree of dispersion from them ean value, and i came up with 3.65, what does this number say about the data?

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- Thread starter yopy
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- #1

- 43

- 0

i know the variance tells us the degree of dispersion from them ean value, and i came up with 3.65, what does this number say about the data?

- #2

Mark44

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- 6,857

- #3

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thank you

- #4

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I thought that in a normal distribution, 69% of your values are within +/- one standard deviation of the mean. So in this case, 68-69% of the data will be in the interval between [tex]\mu - \sqrt{3.65}[/tex] and [tex]\mu + \sqrt{3.65}[/tex], if your mean is [tex]\mu[/tex].

Variance is the average of the squares of the distance between your data and the mean. Like standard deviation, it also measures how spread out your data is.

- #5

Mark44

Mentor

- 35,118

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Thanks for the correction. The (population) variance is the square of the (population) standard deviation.I thought that in a normal distribution, 69% of your values are within +/- one standard deviation of the mean. So in this case, 68-69% of the data will be in the interval between [tex]\mu - \sqrt{3.65}[/tex] and [tex]\mu + \sqrt{3.65}[/tex], if your mean is [tex]\mu[/tex].

Variance is the average of the squares of the distance between your data and the mean. Like standard deviation, it also measures how spread out your data is.

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