Recent content by USN2ENG

Just in case anyone comes across this in the future. It is done by using the multinomial distribution. Apparently the binomial is a generalization of the multinomial with k=2. Good to know.

Homework Statement What is the probability that among a collection of 20 assemblies we have exactly 2 loose-fits and 1 interference fits? P(loose-fit) = .1335 P(Interference fit) = .083 Homework Equations The Attempt at a Solution I am thinking that I just add the two...

V[9X] = 81 * V[X] = 81 * (1.33333) = 144 and then the stdev = 12 Sorry, for some reason I had never put that together.

Homework Statement This was an example but I am not sure why there is a difference in the way they are calculating the standard deviation. A type of battery is produced with an average voltage of 60 with a standard deviation of 4 volts. A: If 9 batteries are selected at random, what...

Thanks, Dr. Vickson

Homework Statement A machine fills cereal boxes, normally distributed, with standard deviation of .1 oz. What amount setting should the machine be set to if only 1% of the boxes can have less than 16oz of cereal? Homework Equations The Attempt at a Solution I am thinking that I...

One last thing Dr. Vickson. Off the top of your head do you know anywhere where I can see more examples of this case? I have been looking through the sensitivity analysis section of my Text (OR applications and algorithms, Winston, 4th edition) and do not seem to find any with equalities (that...

Thanks a lot Dr. Vickson. This was driving me crazy trying to figure it out today. And yes, there is a non negativity constraint and the third constraint is redundant as it parallels the equality constraint. I have no clue why we did not cover this material/method, but I guess it is not the...

Homework Statement This was from a test I took today: Maximize z = 4x + y subject to: 4x + 2y = 7 3x + 2y >= 6 4x + 2y <= 8 1.Graphically solve and find x y and z 2.What are the range of values for c1 (Coefficients of x) so that the solution remains optimal. Homework Equations The Attempt...

Yeah, I just figured that out. My matrix was wrong because I was letting supply go greater than 2. My expression should have been: Max( Min(Xn + Sn, 2) - dn, 0) and my matrix should have been: .82 .18 .00 .70 .30 .00 .70 .30 .00 This should be right, now. Thanks again Mr. Vickson for the help.

Homework Statement Through donations the food bank tries to feed as many people as possible. Assume there are no backorders - any unsatisfied demand is lost. The food bank also has limited facilities to store donations, 200,000lbs maximum can be held in storage. Assume donations are processed...

Thanks for the help Ray!

Sorry, yeah, that is what I meant when I said it was ok if the math turned out that way with the ERO's. So am I right in assuming that the only thing wrong with this present tableau is that it has many solutions due to x2? Thanks for your reply!

Homework Statement This is from a study guide that I don't have the answers to just yet and I am trying to figure out this last problem for my OR class. I am either confused or the problem is written wrong. I am probably confused though. Any help would be great! This Tableau is for a...

Homework Statement Suppose that an experiment has five possible outcomes, which are denoted {1,2,3,4,5}. Let A be the Event {1,2,3} and let B be the event {3,4,5}. (Notice that we did not say that the five outcomes are equally likely: The probability distributions could be anything.) For each...