Project #23192 - statistics

Question 7.42
A large community college district has 1000 teachers, of whom 50% are men and 50% are women.
In this district, administrators are promoted from among the teachers. There are currently 50 administrators, and 70% of these administrators are men.

a. If administrators are selected randomly from the faculty, what is the approximate probability that the percentage of male administrators will be 70% or more?

b. If administrators are selected randomly from the faculty, what is the approximate probability that the percentage of female administrators will be 30% or less?

c. How are question a and b related?

d. Do your answers suggest that it is reasonable to believe the claim that the administrators have been selected randomly from the teachers? Yes or No, and please explain.
Question 7.48
A random rample of likely voters showed that 49% planned to support Measure X. The margin of error is 3 percentage points with a 95% convidence level.
a. using a carefully worded sentece, report the 95% confidence interval for the percentage of voters who plan to support Measure X
b. is there evidence that Measure X will fail?
and 5 more problems like this

 Subject Mathematics Due By (Pacific Time) 02/19/2014 08:00 am
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