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If the mean of a distribution of test scores is 27 points with a standard deviation of 4 points, multiplying each score in the distribution

If the mean of a distribution of test scores is 27 points with a standard deviation of 4 points, multiplying each score in the distribution by 5 will result in a

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new mean equal to 135

new standard deviation equal to 20

new standard deviation equal to 9

Both a and b are correct

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