FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If 5 is added to every value in a data set, how does this affect the measure of center?
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increases by 5
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decreases by 5
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stay the same
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5 times as large
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Explanation:
Detailed explanation-1: -Adding 5 to every value in a data set has no effect on the standard deviation of the data set.
Detailed explanation-2: -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 explanation-3: -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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