Question: Use Table A or software. Consider a Normal distribution with mean 200 and standard deviation 20. (a) Find the proportion of the distribution with values

Use Table A or software. Consider a Normal distribution with mean 200 and standard deviation 20.

(a) Find the proportion of the distribution with values between 190 and 220. Illustrate your calculation with a sketch.

(b) Find the value of x such that the proportion of the distribution with values between 200 − x and 200 + x is 0.75. Illustrate your calculation with a sketch.

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