Probability exercise, Mathematics

1. A psychologist developed a test designed to help predict whether production-line workers in a large industry will perform satisfactorily. A test was administered to all new employees in a corporation. At the end of the first year of work, these employees were rated by their supervisors: 18% were rated excellent, 53% were rated satisfactory and 29% were rated poor. 48% percent of those rated excellent passed the psychologist's test, as did 22% of those rated satisfactory and 12% of those rated poor.

a)  What is the probability that a randomly selected employee will pass the psychologist's test?

b)  What is the probability that an employee who doesn't pass the test will be rated excellent or satisfactory?                             

2. A Professor finds that he awards a final grade of A+ in QT to 20% of the students. Of those who obtain a final grade of  A+, 70% obtained an  A+ in the mid-term examination. Also, 10% of the students who failed to obtain a final grade of  A+ earned an A+ in the mid-term examination. What is the probability that a student with an A+ in the mid term examination will obtain a final grade of  A+  ?  

 

Posted Date: 2/27/2013 12:58:32 AM | Location : United States







Related Discussions:- Probability exercise, Assignment Help, Ask Question on Probability exercise, Get Answer, Expert's Help, Probability exercise Discussions

Write discussion on Probability exercise
Your posts are moderated
Related Questions
A retention counselor at a state university believes that freshman year success is related to high school standard tests in math and reading, and in the number of credits the stude

Coming To Grips With Mathematics :  How does a child acquire mathematical concepts? Can any concept be presented to a child at any stage in such a manner that the child gets some



Chi-square hypothesis tests as Non-parametric test(X2) They contain amongst others i.    Test for goodness of fit ii.   Test for independence of attributes iii.  Test

how do we solve multiple optimal solution

what is 5+10

TWO PERSONS A AND B AGREE TO MEET AT A PLACE BTWEEN 11 TO 12 NOON.  THE FIRST ONE TOARRIVE WAITS FOR 20 MIN AND THEN LEAVE. IF THE TIME OF THIR ARRIVAL BE INDEPENDET AND AT RNDOM,T

How do I convert metric units?

The cost of renting a bike at the local bike shop can be represented through the equation y = 2x + 2, where y is the total cost and x is the number of hours the bike is rented. Whi