A company claims that 10% of the users of a certain allergy drug experience drowsiness. In clinical studies of this allergy drug, 81 of the 900 subjects experienced drowsiness a. We want to test their claim and find out whether the actual percentage is not 10%. State the appropriate null and hypotheses.

b. Is there enough evidence at the 5% significance level to infer that the competitor is correct?

c. Compute the p-value of the test.

d. Construct a 95% confidence interval estimate of the population proportion of the users of this allergy drug who experience drowsiness.

e. Explain how to use this confidence interval to test the hypotheses.

Tyler has coffee with one of his direct reports almost daily. he does this to inquire in an informal way about progress on the job, and to provide coaching and support, as well as appropriate congratulations for special efforts. tyler is exhibiting which type of managerial skill?

When used-car dealers signal the quality of a used car with a warranty, a. buyers believe the signal because the cost of a false signal is high b. it is not rational to believe the signal because some used-car dealers are crooked c. the demand for lemons is eliminated d. the price of a lemon rises above the price of a good used car because warranty costs on lemons are greater than warranty costs on good used cars

Analyzing operational changes operating results for department b of delta company during 2016 are as follows: sales $540,000 cost of goods sold 378,000 gross profit 162,000 direct expenses 120,000 common expenses 66,000 total expenses 186,000 net loss $(24,000) suppose that department b could increase physical volume of product sold by 10% if it spent an additional $18,000 on advertising while leaving selling prices unchanged. what effect would this have on the department's net income or net loss? (ignore income tax in your calculations.) use a negative sign to indicate a net loss answer; otherwise do not use negative signs with your answers. sales $answer cost of goods sold answer gross profit answer direct expenses answer common expenses answer total expenses answer net income (loss) $answer