SOLUTION: According to a past U.S. Census, approximately 20% of U.S. Americans who are age 65 or older have completed 4 or more years of college. For a group of 12 randomly selected U.S. Am

Question 715048: According to a past U.S. Census, approximately 20% of U.S. Americans who are age 65 or older have completed 4 or more years of college. For a group of 12 randomly selected U.S. Americans, who are age 65 or older, answer the following.
7. Find the probability that exactly six of those 12 people have completed 4 or more years of college.

8. Find the probability that at least one of them has completed 4 or more years of college.

9. For this sample of 12 U.S. Americans, find the mean number to have completed 4 or more years of college.

10. Find the standard deviation for this distribution.

11. Check this binomial distribution to see whether it can be approximated by a normal distribution. State either 'Yes, it can' or
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