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Sagot :
Use a Z table to determine the following approximate values:
P(Z < -0.57) = 0.28434
P(Z < 0.72) = 0.76424
Then,
P(a < Z < b) = P(Z < b) - P(Z < a)
P(-0.57 < Z < 0.72) = P(Z < 0.72) - P(Z < -0.57)
P(-0.57 < Z < 0.72) = 0.76424 - 0.28434
P(-0.57 < Z < 0.72) = 0.4799
This result is approximate. To get more accuracy, you'll need to use a stats calculator such as a TI84.
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