Question

please help me guys thanks you ​

Answer 1

Answer:

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Step-by-step explanation:

Note: 0.4314 is area under the normal curve centered on z = 0.

(.4314)/2 = 0.2157 is area to the right of the mean

                 and 0.2157 is area to the left of the mean.

That leaves a left tail of 0.5-0.2157 = 0.2843

-a = invNorm(0.2843) = -0.5701

Ans: a = 0.5701