# Stats

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A set of 50 data values has a mean of 15 and a variance of 36.

Find the standard score of a data value = 30

• Stats -

Use Z equation.

Variance = SD^2

• Stats -

V = 30^2 = 900??

• Stats -

Go the opposite direction. If variance = SD^2, then SD = √variance.

• Stats -

so the SD = 30??

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