Mathematics, 03.02.2020 08:53 koboshy23
Benzene is a toxic chemical used in the manufacturing of medicinal chemicals, dyes, artificial leather, and linoleum. a manufacturer claims that its exit water meets the federal regulation with a mean of less than 7980 ppm of benzene. to assess the benzene content of the exit water, 10 independent water samples were collected and found to have an average of 7900 ppm of benzene. assume a known population standard deviation of 80 ppm and use a significance level of 0.01. test the manufacturer’s claim.(a) state the null and alternative hypothesis. (b) calculate the test statistics. (c) find the p-value and draw your conclusion. round your answer to 5 decimal places. (d) find a 99% two-sided confidence bound on the true mean. round your answer to 2 decimal places.
Answers: 2
Mathematics, 21.06.2019 18:00, kcameronanderso
Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.
Answers: 2
Mathematics, 21.06.2019 20:20, shartman22
20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}
Answers: 2
Mathematics, 21.06.2019 22:30, natalievick03
At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?
Answers: 2
Benzene is a toxic chemical used in the manufacturing of medicinal chemicals, dyes, artificial leath...
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