Question

The mean of 8 Observations is 40 .if 5is added to each observation,then what was will be the new mean?

Answer 1

Answer:

Mean of 8 Observation (Assuming that they are ungrouped and you haven't been given a frequency table)= Sum of all observations/No. of observations

40=Sum of all observations/8

40*8=Sum of all obs. (I have taken the number that was being divided to other side to be multiplied)

Sum of all obs.=320

If 5 is added to each obs. then 5*No. of obs is the amount added=5*8=40

New sum of obs.=320+40= 360

New mean= 360/8= 90/2= 45

Step-by-step explanation: