# Statistics

posted by
**Anonymous**
.

A study in a particular state found that only 5% of the voters have Doctoral degrees. In a random sample of 200 voters, let x be the number who have doctoral degrees.

6) Find the mean of x.

7) Find the standard deviation of x.

8) Find the z-score for x > 10.5

9) What is the probability that more than 10.5 voters in a sample of 200 voters will hold a Doctoral degree?

10) What is the probability that at least 10.5 voters in a sample of 200 voters will hold a Doctoral degree?