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75% of the studentsin a lecture are males. 100 students are selected randomly. a.Find the standars...

75% of the studentsin a lecture are males. 100 students are selected randomly.

a.Find the standars error of the sample.

b.Find the probability of the sample proportion being greater than 0.85

Math   Statistics-And-Probability   
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Answer #1

Refer Standard normal table/Z-table to find the probability or use excel formula "=NORM.S.DIST(2.31, TRUE)" to find the probability.

The probability of the sample proportion being greater than 0.85 is

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