Here is a set of data

3.9, 2.1, 0.8, 1.5, 4.1

A = calculate the mean

B = each piece of data is increased by 5, calculate the new mean

C = each piece of new data is now double, calculate the new mean

A=2.48

B=7.48

C=4.96

Step-by-step explanation:

A=3.9+2.1+0.8+1.5+4.1=12.4

B=

A = 2.48

B = 7.48

C = 14.96

Step-by-step explanation:

A, the formula of Mean is similar to Average so it is, Mean = Total amount / Numbers of data:

Total = 3.9 + 2.1 + 0.8 + 1.5 + 4.1

= 12.4

Data = 5

Mean = 12.4/5

= 2.48

B, given that each data increased by 5, so you have to add 5 to all the data:

Total = (3.9+5) + (2.1+5) + (0.8+5) + (1.5+5) + (4.1+5)

= 37.4

Data = 5

Mean = 37.4/5

= 7.48

C, the new data is again doubled, so you have to multiply 2 to every data:

Total = 2 (8.9) + 2 (7.1) + 2 (5.8) + 2 (6.5) + 2 (9.1)

= 74.8

Data = 5

Mean = 74.8/5

= 14.96