Mean of the data 8, 7, 6, 14, 12, 10, 20, 16, 15 and 14 is 12.2. If each observation is multiplied by 2 and then 3 is added, the new mean is
A. 38.6
B. 61
C. 27
D. 27.4
Answer:D
Mean of the data 8, 7, 6, 14, 12, 10, 20, 16, 15 and 14 is 12.2. If each observation is multiplied by 2 and then 3 is added, the new mean is
A. 38.6 B. 61 C. 27 D. 27.4