Mathematics, 27.12.2020 04:30, msjsnell29
A County Water Department tested the drinking water of randomly selected 10 homeowners for lead and copper contamination. The test results yielded sample mean and sample standard deviation for lead as 2.89 and 3.92 (in µg/L), respectively, and for copper as 0.4083 and 0.2495 (in mg/L), respectively. a) Set up 90% confidence interval for the mean lead level in drinking water in that county and interpret the result. (3 Points) b) Set up 90% confidence interval for the mean copper level in drinking water in that county and interpret the result. (3 Points) c) What are the underlying assumptions? (1 Point)
Answers: 2
Mathematics, 22.06.2019 03:00, andrealch13p3w89f
Abilliard ball is struck by a cue. it travels 1 0 0 cm 100cm before ricocheting off a rail and traveling another 1 2 0 cm 120cm into a corner pocket. the angle between the path as the ball approaches the rail and the path after it strikes the rail is 4 5 ∘ 45 ∘ . how far is the corner pocket from where the cue initially struck the ball? do not round during your calculations. round your final answer to the nearest centimeter.
Answers: 1
A County Water Department tested the drinking water of randomly selected 10 homeowners for lead and...
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Mathematics, 23.12.2019 04:31
Mathematics, 23.12.2019 04:31
Mathematics, 23.12.2019 04:31
Mathematics, 23.12.2019 04:31