Sujet: random liste de sujets
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9 articles trouvés pour ce sujet.

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	Random assignments		2019-03-02
		Ninoshka pose la question : Liu and Michi plan to sign up for a drawing class next term. Drawing is offered during the first 4 periods of the day, and students are assigned randomly to class. What is the probability that Liu and Michi will have drawing together? Penny Nom lui répond.
	Four digits are to be randomly selected		2011-01-20
		sarahbear pose la question : Suppose four digits are to be randomly selected (repetitions allowed) Find the probability that A. 5562 is selected B.0000 is selected C. All four digits are the same D. 2 is the first digit selected Penny Nom lui répond.
	A binomial random variable		2010-11-29
		yvette pose la question : a binomial random variable has a mean equal to 200 and standard deviation of 10. find the values of n and p. Penny Nom lui répond.
	What are the odds that the selections were random?		2007-05-26
		alan pose la question : An employer must select three people for layoff from three groups. Group 1 has 4 members and the oldest member is selected. Group 2 has 7 members and the oldest member is selected. Group 3 has 2 members and the younger is selected. Assuming equal qualifications, what are the odds that the selections were random vs. biased as to age? What is the formula to determine this? Penny Nom lui répond.
	Two word problems		2005-11-14
		Jennifer pose la question : 1. Every other person on a school's parent advisory committee is surveyed to determine how many people support passage of a school bond to build a new elementary school. Is this a good sample? Why or why not? 2.What is the difference in elevation between the highest point in California,Mount Whitney,which towers 4421 meters above sea level, the lowest point in California,Death Valley, which lies 86 meters below sea level? Harley Weston lui répond.
	A random sample		2005-10-16
		Stu pose la question : If I have a set of data points (14 to be exact)of unknown pedigree from a large population, what tests can I apply to see if they constitute a random sample from the large population? Andrei Volodin and Penny Nom lui répond.
	A new way to measure randomness		2003-12-31
		Stephanie pose la question : Last year, I did a science project in which I asked, "Which shuffles better, an automatic card shuffler or shuffling by hand?" To measure this I decided the "best" shuffler was the one to become random first. Last year, to measure randomness, I numbered cards 1-52 and had the subjects shuffle them until they broke up the rising sequences or reached 10 shuffles. (Usually 10 shuffles came first...) Anyway, I did the same thing with the automatic card shuffler, and, as hypothesized, the automatic card shuffler randomized the deck first. This year, I have decided to continue the project. The problem is, I need a new way to measure randomness without the use of fancy computers or something. I have searched the Internet, I have posted my query on websites based on math, and I have searched the local library. I have found many useful things on the Internet, but none of them can tell me a new way to measure randomness. I cannot do a perfect shuffle, and I am not terribly gifted in the art of using computers. If you have any information (anything will help) or advice, I would be greatly obliged. Andrei Volodin lui répond.
	Random		1998-09-15
		Hugh Ballantyne pose la question : I am an occasional teacher. Here is my question: Does the word "random" have a technical meaning in mathematics? Harley Weston lui répond.
	The Central Limit Theorem		1997-04-21
		Donna Hall pose la question : A skeptic gives the following argument to show that there must be a flaw in the central limit theorem: We know that the sum of independent Poisson random variables follows a Poisson distribution with aparameter that is the sum of the parameters of the summands. In particular, if n independentPoisson random variables, each with parameter 1/n, are summed, the sum has a Poisson distributionwith parameter 1. The central limit theoren says the sum tends to a normal distribution, butPoisson distribution with parameter 1 is not normal. What do you think of this argument? Neal Madras lui répond.

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