2010 · Q42
Consider the following data:
X: 1 (f=3), 2 (f=5), 3 (f=9), 4 (f=_), 5 (f=2)
The arithmetic mean of the above distribution is 2.96. What is the missing frequency ?
Elementary MathematicsStatistics
- A4
- B6
- C7
- D8
Explanation
(50+4x)/(19+x)=2.96 gives x=6.