<PRE><B>Question 1042167</B>
A set of data has a mean value of 15 with a standard deviation of 3. Determine the mean and standard deviation if
a) each data value is increased by 7 (2 marks)
The data set moves 7 to the right::
mean = 15+7 = 22
spread has not changed:: std = 3
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b) each data value is decreased by 5 
The data set moves 5 to the left::
mean = 15-5 = 10
spread has not changed:: std = 3
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Cheers,
Stan H.
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