(Ch 7) Suppose a standard normal random variable has an 80 percent chance falling in an interval (–z, z). The value of z is approximately ____ (use Appendix C-1).

Managerial Economics: A Problem Solving Approach
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Chapter17: Making Decisions With Uncertainty
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(Ch 7) Suppose a standard normal random variable has an 80 percent chance falling in an interval (–z, z). The value of z is approximately ____ (use Appendix C-1).

a.

1.45

b.

1.35

c.

1.96

d.

1.28

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