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For a normal-shaped distribution with ? = 50 and ?= 8 a) What proportion of the scores have values b

Question: For a normal-shaped distribution with μ = 50 and σ= 8

a) What proportion of the scores have values between 46 and 54?

b) For Sample of n= 4, what proportion of the samples means have values between 46 and 54?

c) for sample of n= 16, what proportion of the sample mean have values between 46 and 54?

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