Question

If all the observations of a given dataset is decreased by 5 , mean of the dataset will

• A. increase by 5
• B. will remain same
• C. decrease by 5
• D. be multiplied by 5

Answer 1

The correct option is C decrease by 5

(c)
When all the values of dataset are increased or decreased by certain number , mean also increases or decreases by the same number. This is also called as the property of mean.