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.

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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