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標題:
Normal Distribution 題目
發問:
2.Consider a standard normal variable Z. Find c such that a)P(Z
最佳解答:
2. the left hand side column and top row of the normal distribution table is the Z value the value inside the table represent the probability a) since P(Z c) = 0.8 P(Z > c) = 0.2 c = 0.84 find the probability about 0.2 from the table, the Z value of this probability is 0.84 b) P(Z c) = 0.311 P(Z > c) = 0.189 c = 0.88
其他解答:
look at the inverse normal function table, a)inverse of [Q] (p) = z find 0.8 from the table and c = 0.8416 b)invese of p(0.27) = -p(0.73) c = -0.6128 i am not sure about the third one, should be something like 0.5 - -p(0.689) =0.5 - 0.4930
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