Number of results: 3,639
I cleaned up the database by deleting many old posts. Many old data files were also deleted. Please let me know if you run into the annoying and seemingly random software error again. Thanks!
Tuesday, June 13, 2006 at 10:03pm by Jiskha Webmaster
I need help with the following problem: A brighe hand is made up of the 13 cards from a deck of 52. What is the probability of a hand chosen at random containing 6 of one suit, 5 off another, and 2 of another? THe first card can be anything. It seems to me that the probabality...
Monday, June 19, 2006 at 10:07pm by D
Would really urgently appreciate answers to these questions. Thanks. 3. Suppose that two lotteries each have n possible numbers and the same payoff. In terms of expected gain, is it better to buy two tickets from one of the lotteries or one from each? 4. A random square has a ...
Thursday, July 13, 2006 at 7:20pm by Johnny
4 calculators were selected at random from a sample of 44 calculators that were defective and 22 that were in good condition. Find the probability that all 4 calculators are defective. Ok, I'll just start this one. There are 66 choose 4 samples. yes/no? What is the P of 0,1,2,...
Friday, July 14, 2006 at 6:50pm by I love math & science !
Suppose X1;X2;...;X5 is a random sample from a n(0; variance) distribution. define U = X1+X2+X3+X4; V = (X2)^2+(X3)^2+(X4)^2+(X5)^2 and W = U/sqrtV. (a) Name the distribution of U/4 and V/(variance) and give the values of their parameters. (b) (i) Compute k such that kW has a ...
Thursday, August 10, 2006 at 2:04am by ruth
Let X1;X2;X3;...;X6 be a random sample from a distribution with the following probability desity function: Fx(x) = (1+4x)/3 for 0<x<1 = 0 for x=<0; x>=1. (a) Determine the joint p.d.f of Y1 and Y6 where Y1<Y2<...Y6 are the order statistics. (b) Let R= Y6-Y1 ...
Thursday, August 10, 2006 at 2:18am by ruth
CJ-- Can someone proofread before I submit it?
The attacks by Islamic terrorists on September 11, 2001 have increased demands for law enforcement agencies in the areas of officer functions and policing concepts. It has led the American justice system to implement unconventional tasks for combating terrorism. The ...
Thursday, September 14, 2006 at 3:55pm by Emanuel
We have been getting numerous questions like this on assignments and I can't figure them out. Its like I know that there some way connected but I can't figure it out. This is for Chemistry in highschool and its likea review and so they are not going over it but I would still ...
Sunday, September 17, 2006 at 10:28am by Tracy
CJ -- proofread please
The federal criminal pretrial process begins with the first appearance. This appearance is held before a magistrate during which the legality of the defendantís arrest is initially assessed and the defendant is informed of the charges on which he or she is being held (...
Thursday, September 21, 2006 at 8:00pm by K
STAT-discrete random varaibles
a driver passes 4 sets of traffic lights. the random varaible X is the number of traffic lights he has to stop at. the probabilty distribution for x is given: x 0 1 2 3 4 prob 0.1 0.2 0.3 0.2 0.2 a) find the upper quartile of the number of traffic lights at which the driver ...
Sunday, April 22, 2007 at 5:32am by mick
finite math-random variables
Assume that a deck of cards contains 4 aces, 5 other face cards, and 13 non-face cards, and that you randomly draw 3 cards. A random variable Z is defined to be 3 times the number of aces plus 2 times the number of other face cards drawn. Complete the probability density ...
Thursday, October 9, 2008 at 4:29pm by Angela
sometimes it is difficult or impossible to determine the population size before selecting a random sample. describe how you would go about selecting a random sample of trees from a 1-square mile area of forest.
Tuesday, February 3, 2009 at 12:52am by Anonymous
Tuesday, February 3, 2009 at 12:52am by Writeacher
Would this correctly result in random assignment? 1. A researcher assigns students to one of three conditions based on the month of their birth. If they were born in January, April, July, or October, they are assigned to condition A. February, May, August, and November births ...
Monday, March 2, 2009 at 2:03pm by ash
Would this correctly result in random assignment? A researcher assigns students to one of three conditions based on the month of their birth. If they were born in January, April, July, or October, they are assigned to condition A. February, May, August, and November births are...
Monday, March 2, 2009 at 2:11pm by ash
For the standard normal random variable Z, compute the following probabilities. For the following problems, use four decimal places. 16. P (0 °‹ Z °‹ .9) 17. P (-1.3 °‹ Z °‹ 0) 18. P(Z > 2.5) 19. P(Z °› -.75) 20. P(Z < .05) 21. P (Z °‹ -.72)
Monday, August 2, 2010 at 2:05pm by Donna
For the standard normal random variable Z, compute the following probabilities. For the following problems, use four decimal places. 16. P (0 less than or equal to Z less than or equal .9) 17. P (-1.3 less than or equal to Z less than or equal to) 18. P(Z > 2.5) 19. P(Z ...
Monday, August 2, 2010 at 2:48pm by Felicia
Hi this is kind of random but since this is a a homework help website I feel as though you would be able to give me a good answer. I want to be a tutor in my local area for elementary, middle and highschool school kids but I don't really know what to put on my advertisement ...
Monday, February 28, 2011 at 4:50pm by Lena
Statistics (binomial random variable)
Let x be a binomial random variable with n = 10 and p = .4 Find the values. P (xõ4) P (x≤4) I could really use some examples to help me get started and understand it. Thanks
Saturday, April 23, 2011 at 11:10pm by sonney32
Posted by Alex on Saturday, June 4, 2011 at 12:55pm. Based on readings from the first 20 chapters of "Invisible Man", what does the narrator mean when he refers to himself as "invisible"? Is it because of all the situations he been in and no one really seeing him or his ...
Saturday, June 4, 2011 at 8:45pm by Alex