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A set of observations follow a Normal distribution with mean 40 and standard deviation 4. What proportions of observations have values a)greater than 46 b)

A set of observations follow a Normal distribution with mean 40 and standard deviation 4. What proportions of observations have values a)greater than 46 b) less than 34 c) between 34 and 46.

Can you explain which number you would use for the value on each instance?

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