Mathematics, 24.01.2020 20:31 rose5986
Two years ago, the average level of a certain noxious chemical at the mouth of the kentucky river was 180 parts per million. since then, new water treatment facilities have been added upstream and dumping regulations have been strictly enforced, leading to the belief that the average level of the pollutant has been reduced. to verify this belief, 49 random samples are taken at the mouth of the river. the mean and standard deviation of these samples are, respectively, 162 parts per million (ppm) and 42 ppm. what hypotheses would you test if you want to show that the mean level of this particular pollutant has been reduced? what is the value of the appropriate test statistic for verifying the belief? what is the p-value of the appropriate test for verifying the belief?
Answers: 2
Mathematics, 21.06.2019 14:00
Colin listed his assets and liabilities on a personal balance sheet. colin’s balance sheet (august 2013) assets liabilities cash $1,500 credit card $500 stocks $800 rent $800 car $5,000 car loan $1,200 coin collection $1,200 student loan $5,000 total total which statement is true about the total assets and the total liabilities? the total of the assets and the liabilities are the same. the total of the assets is greater than the total of the liabilities. the total of the assets is less than the total of the liabilities. the total of the assets cannot be compared to the total of the liabilities.
Answers: 2
Mathematics, 21.06.2019 20:00
Which of the following is the inverse of y = 3∧x y = 1/3∧x y = ㏒3x y = (1/3) ∧x y = ㏒ 1/3∧x
Answers: 1
Mathematics, 21.06.2019 22:30
What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6
Answers: 1
Two years ago, the average level of a certain noxious chemical at the mouth of the kentucky river wa...
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