The National Center for Educational Statistics reported that 82% of freshmen entering public high schools in the
Question:
The National Center for Educational Statistics reported that 82% of freshmen entering public high schools in the U.S. in 2009 graduated with their class in 2013.
A random sample of 135 freshmen is chosen.
a. Find the mean μp̂.
b. Find the standard deviation σp̂
c. Find the probability that less than 80% of freshmen in the sample graduated.
d. Find the probability that the sample proportion of students who graduated is between 0.75 and 0.85.
e. Find the probability that more than 75% of freshmen in the sample graduated.
f. Would it be unusual if the sample proportion of students who graduated were more than 0.90?
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Related Book For
Question Posted: