Mathematics, 15.05.2021 23:40 Pandorasbx2657
Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentrations increasing progressively up the food chain (fruit < vegetables < cereals < nuts < corpse). Geochemical surveys take soil samples to determine phosphorous content (in ppm, parts per million). A high phosphorous content may or may not indicate an ancient burial site, food storage site, or even a garbage dump. Independent random samples from two regions gave the following phosphorous measurements (in ppm). Assume the distribution of phosphorous is mound-shaped and symmetric for these two regions.
Region I: x1; n1 = 15
853 1,549 1,230 875 1,080 2,330 1,850 1,860
2,340 1,080 910 1,130 1,450 1,260 1,010
Region II: x2; n2 = 14
538 808 790 1,230 1,770 960 1,650 860
890 640 1,180 1,160 1,050 1,020
A button hyperlink to the SALT program that reads: Use SALT.
(a)
Use a calculator with mean and standard deviation keys to verify that x1, s1, x2, and s2. (Round your answers to four decimal places.)
x1 =
Correct: Your answer is correct.
ppm
s1 = ppm
x2 = ppm
s2 = ppm
(b)
Let 1 be the population mean for x1 and let 2 be the population mean for x2. Find an 80% confidence interval for 1 − 2. (Round your answers to one decimal place.)
lower limit
upper limit
Answers: 3
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Me #1 using vocabulary words, including the word “congruent”, state why the measure of angle d is 120 degrees. #2 what is the measure of angle e and why?
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An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.
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Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min
Answers: 3
Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentration...
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