Loading [MathJax]/jax/output/HTML-CSS/jax.js


1)

The mean of the data set comprising of 16 observations in 16. If one of the observation valued 16 is deleted and three new observations valued 3,4 and 5 are added to the data, then the mean of the resultant data is


A) 16.8

B) 16.0

C) 15.8

D) 14.0

Answer:

Option D

Explanation:

Given  ,  x1+x2+x3+...+x1616=16

       16i=1x1=16×16

 Sum of new observations

           =18i=1yi=(16×1616)+(3+4+5)=252

  Number of observations =18

    New mean  =   18i=1yi18=25218=14