Statistics - Probabilities
- Option : B
- Explanation : When each item is increased by λ, the S.D. is multiplied by |λ| and variance is multiplied by λ2
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47. If mode of a data is 18 and mean is 24, then median is
- Option : C
- Explanation : 18 = 3 Median -2 x 24
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48. If μ is mean of distribution, then 
is equal to
- Option : C
- Explanation :
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- Option : C
- Explanation :
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50. If cov (X, Y) = 0, then which of the following is negative?
- Option : D
- Explanation : Cov (X, Y), byx, bxy and p(X,Y) all are either positive, or 0 or negative simultaneously
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