Thursday

February 26, 2015

February 26, 2015

Posted by **Kay** on Friday, July 29, 2011 at 2:17pm.

A company requires all employees to take drug test. The company can afford only the inexpensive drug test- the one with a 5% false-positive rate and a 10% false-negative rate. (This means that 5% of those who aren't using drugs test positive incorrectly and 10% of those who are using drugs test negative). Suppose that 10% of the employees in the company are using drugs and answer the following questions.

a. If one employee is chosen at random what is the probability that the employee uses drugs and tests positive?

b. If one employee is chosen at random, what is the probability that the employee does not use drugs but tests positive anyway.

c. If one employee is chosen at random, what is the probability that the employee tests positive.

d. If we know that a randomly chosen employee has tested positive, what is the probability that he uses drugs.

Please explain how to determine the probabilities.

**Answer this Question**

**Related Questions**

statistics - Use the following scenario to answer the next 5 questions. Millions...

statistics - A false positive rate of 5% is considered to be a conservative ...

statistics - It is known that 10 % of a school's athlete population uses drugs...

m/c - A researcher is hired by a company to ascertain the morale of company ...

statistics - A small company has 9 female employees and 15 male employees. In ...

Statistics - A research article reports the results of a drug test. This ...

Statistics - True or False Question. I need help please. A sientific paper ...

Statistics - Assume that the cure rate for a certain drug is 20% and that 15 ...

accounting - hey there, i was wondering if anyone could help me with the ...

Economics/social studies - This isn't an example of an invisible hand is it? A ...