Statistics · JEE Main previous year questions

2010 1 question

1. Q232010 · 25 Apr 2010 · Shift 1

   For two data sets, each of size 5, the variances are given to be 4 and 5 and the corresponding means are given to be 2 and 4, respectively. The variance of the combined data set is

   1. A.$\frac{5}{2}$
   2. B.$\frac{11}{2}$
   3. C.$6$
   4. D.$\frac{13}{2}$
   Show answer

   Answer: B