Posted by **Dawn** on Wednesday, August 4, 2010 at 8:23pm.

Many women take oral contraceptives to prevent pregnancy. Under ideal conditions, 1% will become pregnant within one year. In typcal use, 5% become pregnant. Choose 20 random women taking the pill. How many become pregnant in the next year?

a. What is the probability that at least one woman becomes pregnant under ideal conditions?

b. What is the probability in typical use?

Part 2-Based on a random sample of 500 women taking the pill:

c. Based on the information about typical use in b, what is the probablity that at least 25 of these women become pregnant in the next year? Check that the Normal approximation is permissable and use it to find this probability.

d. We can't use the Normal approximation to the binomial distributions to find thisprobability under ideal conditions as described in Part I. Why not?

- Statistics -
**Anonymous**, Saturday, April 25, 2015 at 2:42am
gchfgc

## Answer This Question

## Related Questions

- statistics - Pharmaceutical companies advertise for the birth control pill an ...
- AP Statistics - A study sought to determine whether the ancient Chinese art of ...
- Statistics - In practical use, oral contraceptives have a 5% chance of failing. ...
- Health (Ms. Sue) - 1. Why do you think some teens believe that they can't get ...
- Psychology - The impact of drug x on fertility rates in young women A....
- Intro toEpidemiology and health data anaysisl - If the mean number of cigarettes...
- Science - The normal recommended amount of Vitamin C is 1,000 milligrams (mg) ...
- Persuasive Wrtiting - Teen Moms: Aren’t Ready Did you know that three out of ten...
- HELP getting gray hair with this one - Pregnancy Test Results Positive Test ...
- math - Pregnancy Test Results Positive Test Result (Pregnancy is indicated) ...

More Related Questions