Quiz 1m past info

Quiz 1m past info - Quiz 1m Started: October 6, 2006 4:58pm...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Quiz 1m Started:   October 6, 2006 4:58pm Finished:   October 6, 2006 5:28pm Time spent:   30 min. 6 sec. Question 1    (5 points) A company makes computers which contain a chip which is supplied by three vendors with equal likelihood.  Vendors are known to supply defective chips with the following probabilities 'A' .003; 'B' .002; and 'C' .001. If a  computer is found to have a bad chip what is the probability that the chip came from vendor 'A'?  Student response: Using Bayes Theorem P[A\B]=P[A|B]P[B]/P[A] we find that the probability bad chip came  from vendor A is (1/.002*.002/(.002+.001))/((1/.002)*(.002/(.002+.001)= .001 Score: 3 / 5 Grader comments math errors--P(bad)= 1/3(.001+.002+.003)=.002; P(A|bad)= ((.003)1/3)/.002= 1/2 Question 2    (5 points) Given two events A and B, and that the probabilty of their intersection is the product of the individual probabilities.  Are events A and B independent?  Student response: If two events have a non-zero probability of occurrence, then by comparison it is established  that two events cannot be independent. In order for them to be independent they must have  an intersection. Since there is a probability of an intersection then events A and B are  independent. Score: 5 / 5 Total score: 8 / 10  =  80.0% Quiz 1m User ID:   williamng Attempt:   1 / 1 Out of:   10 Started:   January 13, 2006 11:55am Finished:   January 13, 2006 12:13pm Time spent:   17 min. 28 sec. Student exceeded allotted time of 15 min. by 2 min. 28 sec.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Quiz 1m past info - Quiz 1m Started: October 6, 2006 4:58pm...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online