the standard deviation of the data in following distribution: 12 13 14 32 15 21 16 15 17 8 13 20

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Q: below.

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Q: HW 2: If Z- N(0,1), find a) p(Z > 1.2) b) p(-2 < Z < 2) c) p(-2 < Z < 1)

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Q: d. P[Z > a ] = 0.7517 e. P[-a < Z < a] = 0.9954 %3D

A: Given that  Z follows standard normal distribution  D) P(Z&gt;a)=0.7517 E) P(-a&lt;Z&lt;a)=0.9954