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Mean and variance of normal distribution are 20 and 9 respectively. Find Q,, Q2 and. |
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Answer» Mean = μ = 20, variance = σ2 = 9. ∴ σ = 3. We know that Q1 = μ – 0.6745 σ = 20 – (0.6745 × 3) = 17.9765 = 18. For a Normal distribution: Q3 = μ + 0.6745 σ = 20. + (0.6745 × 3) = 22.02 = 22 And θ2/ p = Median = mode = 20 = θ2. |
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