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Currently 25% of students entering colleges or universities comparable to UNC Charlotte graduate within four years....

Currently 25% of students entering colleges or universities comparable to UNC Charlotte graduate within four years. Find the probability that in a random sample of 300 students who began college this semester at least 25%will graduate with four years.

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Answer #1

P(p^> 0.25)

= P(Z > 0)

=0.5

as Z = (p^- p)/sqrt(pq/n)

= (p^- 0.25)/sqrt(0.25*0.75/300)

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