FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
Question
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If 5 is added to every value in a data set, how does this affect the measure of center?

increases by 5


decreases by 5


stay the same


5 times as large

Explanation:
Detailed explanation1: Adding 5 to every value in a data set has no effect on the standard deviation of the data set.
Detailed explanation2: If 5 is added to each value, We know that adding a constant to each value Mean will be changed by adding a constant value and standard deviation remain the same. Standard deviation will not change.
Detailed explanation3: Where the average is: 3. So the variance equals: 0.8. Now, i read around that if I multiply the observation values by 5, the variance should increase by 25.
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