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P (minus .57 < Z < .72)

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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