Saturday
April 18, 2015

Homework Help: Statistics

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?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

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: Arenít 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) ...
Math Need Help. No Idea how to solve - A medical researcher is interested in the...

Members