A data set consists of 10 numbers If each number in the data

A data set consists of 10 numbers. If each number in the data set has its value increased by 5 by how much will the mean of the scores in the data set change?

Enter correct answer by selecting the appropriate letter.

a     The mean stays the same.

b     The mean increases by 5.

c     The mean increases by 50.

d      None of the choices are correct.

Solution

b. The mean increases by 5.

Data points at mean k, if each of the data point is increased by d , true mean average k+d