Question 2
Homework Answers
Q.2) Solution :
A) P(-1.54 <= Z <= 2.03) = P(-1.54 - 0.5 < Z < 2.03 + 0.5)
= P(-2.04 < Z < 2.53)
= P(Z < 2.53) − P(Z < −2.04)
= 0.9943 - (1 − P(Z < 2.04))
= 0.9943 - (1 − 0.9793)
= 0.9736
B) P(Z >= 3.12) = 1 - P(Z < 3.12)
= 1 - 0.9991
= 0.0009
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