Mathematics, 14.04.2020 19:59 Har13526574
Acid rain caused by reaction of air pollutants with rainwater appears to be a growing problem in the northeastern United States. Pure rain falling through clean air registers a pH value 5.7(pH is measure of acidity (0 is acid; 14 is alkaline). Suppose water samples from 40 rainfalls are analyzed for pH, and x (bar) and s are equal to 3.7 and .5 respectively. For a 99% confidence Interval for the mean pH in rainfall, what is the width of the interval?
Answers: 2
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Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct
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Aplane intersects a pris paralel to the base of the prism. the cross section is a polygon wth eight sides. how many sides does the base of the prism have? a. 10 b. 8 c. 7 d. 9
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Acid rain caused by reaction of air pollutants with rainwater appears to be a growing problem in the...
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