A classroom of n 5 children has a mean score of 13800 on a

A classroom of n = 5 children has a mean score of 13.800 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 12.333. Find the value of the new child\'s hyperactivity score.

Solution

A classroom of n = 5 children has a mean score of 13.800 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 12.333.

total hyperactivity earlier = 13.80*5 = 69.00

when one child is added , then 12.333*6 = 74

the new child\'s hyperactivity score , 74-69 = 5