Mathematics, 10.01.2021 20:00 ashiteru123
The Environmental Protection Agency has determined that safe drinking water should contain no more than 1.3 mg/litre of copper. You are testing water from a new source and take 30 water samples. The mean copper content in your samples is 1.36 mg/l and the standard deviation is 0.18 mg/l.
Do these samples provide convincing evidence at the = 0.05 level that the water from this source contains unsafe levels of copper? Justify your answer.
Can someone help me out???
Answers: 1
Mathematics, 21.06.2019 17:00, a897coleman
One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?
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Mathematics, 21.06.2019 18:30, gthif13211
1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation
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The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?
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The Environmental Protection Agency has determined that safe drinking water should contain no more t...
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