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for a normal-shaped distribution with n=50 and siqma =8 :

a- what proportion of the scores have values between 46 and 54?

b- for samples of n= 4, what means have values what proportion of the sample mean have values between 46 and 54?

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

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