1 Answer
Solution :-
\(\overline{x}= A +\dfrac{\displaystyle\sum_{i=1}{f_i}u_i }{N}× h\)
\( 105+\dfrac{2}{30}\times 30\)
= 105 + 2
= 107
Now Variance,
= \( σ^2= \dfrac{h^2}{N^2}[N\displaystyle\sum_{i=1}{f_i}u_i^2-(\displaystyle\sum_{i=1}{f_i}u_i)^2] \)
= \( ( \dfrac{30^2}{30^2})[30\times 76 – (2)^2]\)
= 2280 - 4
= 2276
Answered by Abhisek | 1 year agoRelated Questions
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