Find the area under the normal curve to the left of z= -0.28 plus the area under the normal curve to the right of z =1.40.
The combined area is?
Using standard normal z-table we get,
P(Z < -0.28) = 1 - P(Z < 0.28) = 1 - 0.6103 = 0.3897
and
P(Z > 1.40) = 1 - P(Z < 1.40) = 1 - 0.9192 = 0.08078
Therefore, we get,
P(Z < -0.28) + P(Z > 1.40) = 0.3897 + 0.0808 = 0.4705
=> The combined area is 0.4705
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