Statıstıcs I Deneme Sınavı Sorusu #836440
Random variable X has normal distribution, mean μ=25 and variance σ2=16. Determine the probability P (30 ≤ X ≤ 35) in terms of standard normal distribution?
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P(0.25 ≤ z ≤ 0.75) |
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P(0.50 ≤ z ≤ 1) |
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P(0.25 ≤ z ≤ 1.5) |
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P(1 ≤ z ≤ 2) |
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P(1.25 ≤ z ≤ 2.5) |
Yanıt Açıklaması:
z = (x – m) / sd ; sd = variance1/2 ; (30 – 25) / 4 = 1.25 ; (35 – 25) / 4 = 2.5 ; P(1.25 <= z <= 2.5). pg. 200. Correct answer is E.
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