Mathematics, 30.03.2020 19:15 quesleeze
1.A national organization has been working with utilities throughout the nation to find sites for large wind machines that generate electricity. Wind speeds must average more than 25 miles per hour (mph) for a site to be acceptable. Recently, the organization conducted wind speed tests at a particular site. Based on a sample of 43 wind speed recordings (taken at random intervals), the wind speed at the site averaged 25.8 mph, with a population standard deviation of 4.2 mph. To determine whether the site meets the organization's requirements, consider the test, H0: µ = 25 vs. Ha: µ > 25, where µ is the true mean wind speed at the site and ΅= .01. Suppose the value of the test statistic were computed to be 1.25. State the conclusion. A) At ΅= .01, there is sufficient evidence to conclude the true mean wind speed at the site exceeds 25 mph. B) At ΅= .01, there is insufficient evidence to conclude the true mean wind speed at the site exceeds 25 mph. C) We are 99% confident that the site meets the organization's requirements. D) We are 99% confident that the site does not meet the organization's requirements.
Answers: 2
Mathematics, 21.06.2019 19:30
Which table shows a proportional relationship between miles traveled and gas used?
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Mathematics, 21.06.2019 22:00
Find two numbers if their sum is 91 and the ratio is 6: 7?
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Mathematics, 21.06.2019 23:30
Afriend of mine is giving a dinner party. his current wine supply includes 10 bottles of zinfandel, 8 of merlot, and 11 of cabernet (he only drinks red wine), all from different wineries. (a) if he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this? ways (b) if 6 bottles of wine are to be randomly selected from the 29 for serving, how many ways are there to do this? ways (c) if 6 bottles are randomly selected, how many ways are there to obtain two bottles of each variety? ways (d) if 6 bottles are randomly selected, what is the probability that this results in two bottles of each variety being chosen? (round your answer to three decimal places.) (e) if 6 bottles are randomly selected, what is the probability that all of them are the same variety? (round your answer to three decimal places.)
Answers: 3
Mathematics, 22.06.2019 02:20
If you draw a card with a value of three or less from a standard deck of cards, i will pay you $43. if not, you pay me $11. (aces are considered the highest card in the deck.) step 1 of 2 : find the expected value of the proposition. round your answer to two decimal places. losses must be expressed as negative values.
Answers: 2
1.A national organization has been working with utilities throughout the nation to find sites for la...
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