Randomly sample 256 items from a population where individuals have a normal distribution with mean of 250 and a standard deviation of 80, find the following probability rounded to 4 decimal places. 230 235 240 z = -4 z = -2 P(Z < 252.4) 245 250 z = 0 255 260 265 z = 2 270 Z =
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A: given data normal distribution μ = 245.7σ = 34.7 n = 32 P(240<x¯<260) = ?
Given,
Sample size, n = 256
Mean, μ = 250
Standard deviation, σ = 80
Using formula,
Step by step
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