TS EAMCET ยท Maths ยท Statistics
The variance of the following frequency distribution is
| x | 1 | 2 | 3 | 4 |
| P(x) | 20 | 40 | 60 | 80 |
- A 4
- B \(\frac{3}{2}\)
- C 2
- D 1
Answer & Solution
Correct Answer
(D) 1
Step-by-step Solution
Detailed explanation
The variance of the following frequency distribution isx 1 2 3 4 P(x) 2c 4c 6c 8c So, standard deviation of \(X\) is Now, \(2 c+4 c+6 c+8 c=1 \Rightarrow c=\frac{1}{20}\) for standard deviationโฆ
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