Find the following probabilities. Use drawings to assist when necessary. Round all probabilities to 4 decimal places.
P(z > 1.94)
P(z < -2.16)
P(-0.75 < z < 1.86)
Solution :
Using standard normal table,
P(z > 1.94) = 1 - P(z < 1.94) = 1 - 0.9738 = 0.0262
P(z < -2.16) = 0.0154
P(-0.75 < z < 1.86) = P(z < 1.86) - P(z < -0.75) = 0.9686 - 0.2266 = 0.7420
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