Question

mean of 8th observation is 4.if 7 observation are 5,4,2,2,4,4,3 find the8th observation

Answer 1

5+4+2+2+4+4+3+x/8=4
x=8

Answer 2

Answer:

8 th observation is 8

Step-by-step explanation:

Mean of 8 observations = 4 .

Mean = Sum of 8 observations / number of observations .

Let the 8 th observation be x .

Sum of 8 observations = 5 + 4 + 2 + 2 + 4 + 4 + 3 + x

                                      = 9 + 4 + 11 + x

                                      = 24 + x

Mean = sum / 8

= > 4 = sum / 8

= > 4 = ( 24 + x ) / 8

= > 24 + x = 32

= > x = 32 - 24

= > x = 8

Answer is 8