Problems related to texts Chapter 6a 61 to 63 6 Multiple cho

Solution

(6) D. All of the above

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(7)(a) P(z < 0) = 0.5 (from standard normal table)

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(b)P(z > 0.5) = 0.3085 (from standard normal table)

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(c)P(-2.2 < z < 1.2) = 0.8710(from standard normal table)

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(d)P( z < 0.75) = 0.7734 (from standard normal table)

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(e) P(Z<z)=0.95

--> z= 1.64 (from standard normal table)