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A distribution of measurements is relatively mound-shaped with mean 50 and standard deviation 5. (a) What...

A distribution of measurements is relatively mound-shaped with mean 50 and standard deviation 5.

(a) What proportion of the measurements will fall between 45 and 55?

(b) What proportion of the measurements will fall between 40 and 60? 0.68

(c) What proportion of the measurements will fall between 40 and 55?

(d) If a measurement is chosen at random from this distribution, what is the probability that it will be greater than 55?

Math   Statistics-And-Probability   
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