Z test table normal distribution3/6/2024 ![]() So if \(x\) follows a normal distribution then \(z\) follows a standard normal distribution.Ĭonverting \(x\) into \(z\) may seem theoretical. The result of doing so is that \(z\) is given a standard of μ = 0 and σ = 1. With these 3 numbers we could also compute a z-score: we know its population standard deviation σ.Why? Well, we can use a normal distribution to look up a probability for \(x\) if The standard normal distribution is the only normal distribution we really need. ![]() The normal distribution is the probability density function defined by Finding Critical Values from an Inverse Normal Distribution.Finding Probabilities from a Normal Distribution.Normal Distribution – Quick Introduction By Ruben Geert van den Berg under Statistics A-Z
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