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7 February, 05:36

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. Last year there were 63 inches of snow. Find the number of standard deviations from the mean that is, rounded to two decimal places

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  1. 7 February, 06:34
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    This is 2.5 standard deviations from the mean.

    We find this by subtracting the mean from our value, and dividing by the standard deviation:

    (63-38) / 10 = 25/10 = 2.5
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