Number of results: 11,044
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
math - probability
Albino rats used to study the hormonal regulation of metabolic pathway are injected with a drug that inhibits body synthesis of protein. Usually, 4 out of 20 rats die from the drug before the experiment is over. a) If 10 animals are treated with the drug, what is the expected ...
Saturday, October 14, 2006 at 7:45pm by Lindz
The Athletic Director at a major Midwestern University, Biff Barnhart, is about to lose another night’s sleep over the school’s ailing football team. The Beagles have just finished their 3rd consecutive losing season. At a bit past 1 AM he took another call from Ian “Abe” ...
Monday, February 9, 2009 at 11:12pm by Peter
stats need help
.45 is .05 away from the mean or .05/.023 = 2.17 standard deviations away from the mean. Your stats book should have a cumulative normal distribution table. Look up 2.17. I get .9850, meaning that the probability of observing a sample where more than 45% is 1-.985 = .015=1.5...
Tuesday, March 17, 2009 at 9:59am by economyst
Expected number is .1*1000 = 100 SD is sqrt(n*p*q) = 1000*.1*.9 = 9.49 90 is 10 away from the mean and 10/9.48= 1.05 standard deviations away. Your stats book should have a cumulative normal distribution table. look up 1.05. I get .8531. Ergo, the probability of seeing more ...
Friday, March 20, 2009 at 5:23pm by economyst
Algebra 2 - stats and probability
I need someone to tell me how to set these up please? 1. A box contains 4 quarters. 2 of the quarters have the American eagle on the back. Suppose you draw 2 quarters at random with replacement. a. What's the probability that both have the American eagle on the back? b. What's...
Wednesday, May 13, 2009 at 1:37pm by Kay
Probability - Stats
12. Recall from our discussion in class (also see the website) that the hypothesis testing framework can be applied by food and beverage companies seeking to hire “tasters” who have above average taste-discrimination ability. Suppose a brewer intends to use the triangle taste ...
Wednesday, November 25, 2009 at 1:32pm by Desire
help please! A IRS auditor randomly selects 3 tax returns from 53 returns of which 13 contain errors. what is the probability that she selects none of those errors?
Monday, April 12, 2010 at 9:21pm by anonymous
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.
Monday, April 12, 2010 at 9:21pm by PsyDAG
Make a Venn diagram. 5% fail math only 25% fail both 10% fail stats only 60% pass both. Of the 30% (of all students) who failed math, 5/6 of that group (25% of all students)failed stats also. That is a conditional probability of 83.3%. Only 16.7% of the math-failing group pass...
Friday, October 15, 2010 at 6:10am by drwls
given a chart with rain in inches- the greatest amount being 15 inches on the chart, we know the cumulative proability is 1. what is the probability of more than 15 inches of rain falling
Friday, January 21, 2011 at 1:01am by joy
Zero, since the integrated (cumulative) probability of receiving less rain is one.
Friday, January 21, 2011 at 1:01am by drwls
Friday, January 21, 2011 at 1:01am by joy
Probability & Stats
what is the probability that no two students will have the same birth date in a size of 60 class
Thursday, February 17, 2011 at 4:12pm by Apple
Of 10 girls in a class, 3 have blue eyes. If two girls are chosen at random, what is the probability that (i) both have blue eyes, (ii) neither has blue eyes, (iii) at least one has blue eyes? I have the answers but do not know how to get them. I'm trying to use a tree diagram...
Wednesday, March 16, 2011 at 12:17am by Morgan
(i) Choosing the first girl with blue eyes = 3/10. Since there is no replacement, the probability of the second girl having blue eyes = 2/9. The probability of both/all occurring is found by multiplying the individual probabilities. (ii) Do similar process with non-blue ...
Wednesday, March 16, 2011 at 12:17am by PsyDAG
ap stats-- probability
over a 5 year period of time, 80% of winter days in Philadelphia had an average temperature above freezing. 20% of those days had precipitation. Of the days with an average temperature below freezing, 15% had precipitation. A winter day is chosen at random. Find the ...
Wednesday, October 24, 2012 at 2:52pm by zack
incorrect. Law of addition: P(A or B) = P(A)+ P(B)- P(A and B) source: http://www.quickmba.com/stats/probability/
Sunday, December 30, 2012 at 7:50pm by TutorCat
Repeated die toss experiment. A fair die is tossed repeatedly, and the sequence of numbers that turn up is recorded, until a 1 is obtained. When a 1 is obtained, the experiment is over, but the 1 is included in the sequence. Thus every outcome is a sequence of integers ending ...
Sunday, September 29, 2013 at 9:20pm by denim
Probability of NOT getting a 1 = 5/6, getting a 1 = 1/6. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. For five tosses: (5/6)^4 * 1/6 = ?
Sunday, September 29, 2013 at 9:20pm by PsyDAG