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When Richard Stallman founded the Free Software Foundation in 1985, he was able to tap into the energy of many programmers around the world who wanted to work on a free operating system. Later, in the early 1990s, Linux Torvalds was also able to fi nd programmers to help him, in this case, to develop the Linux kernel. Why are so many programmers willing to work a long time on a diffi cult project and then give away the fruits of their labor for free? Is this more common with young programmers than old programmers? If so, why?
Can one conclude at the 0.05 significance level that the morning class performed worse than the afternoon class? Work the problem first by hand, supplying all the details for the Mann-Whitney U test.
(a) Use Excel to compute both a three-period and a five-period moving average time series of company liquidations. (b) Plot the original time series of company liquidations and the three-period and five-period moving average values on the same grap..
you write a new app that can take a picture of someone and automatically draw a funny mustache on them. it takes 3
Community college spends each year. If she wishes to be 90% confident, how large a sample is necessary if the standard deviation is known to be $80?
In chi-square goodness-of-fit test when there is close agreement between observed frequency and expected frequency, chi-square test value will be small.
The Web-based company Henrietta Balloons has a goal of processing 96% of its orders on the same day they are received. If 95 out of the next 100 orders were processed on the same day, would this prove that they are exceeding their goal, using a 90%..
Tests on a certain battery have determined that the mean (average) time until failure is 40 hours. Assume that the time T until failure of the battery is exponentially distributed. What is the probability that the battery will fail within 40 hours
A marketing analyst was studying the readability of two advertisements, each produced by a major company, and printed in the newspaper.
the weight of an ice-cream shops sundae special is known to be normally distributed with a mean of 0.5 pounds and a
An oocyte is a female germ cell involved in reproduction. Based on analyses of a large sample, the article "Reproductive Traits of Pioneer Gastropod Species Colonizing DeepSea Hydrothermal Vents After an Eruption" (Marine Biology, 2011: 181-192) ..
A company supplies its marketing manager with a new car every three years. They can either buy the car out-right or lease it for the three year period.
Calculate GM's Altman Z-Score. Show your calculations. Based on your calculations, would you agree or disagree with Lutz that GM is over the worst? Explain in detail.
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