Question: 3.23 The proportion of observations from a standard Normal distribution that take values between 1 and 2 is about (a) 0.025. (b) 0.135. (c) 0.160.

3.23 The proportion of observations from a standard Normal distribution that take values between 1 and 2 is about

(a) 0.025.

(b) 0.135.

(c) 0.160.

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