Mathematics, 29.11.2019 04:31 aeress
Recently many companies have been experimenting with telecommuting, allowing employees to work at home on their computers. among other things, telecommuting is supposed to reduce the number of sick days taken. suppose that at one firm, it is known that over the past few years employees have taken a mean of 5.4 sick days. this year, the firm introduces telecommuting. management chooses a simple random sample of 80 employees to follow in detail, and, at the end of the year, these employees average 4.4 sick days with a standard deviation of 2.8 days. let μ represent the mean number of sick days for all employees of the firm.
(a). find the p-value for testing h0 : ? ? 5.4 versus h1 : ? < 5.4.
(b). do you believe it is plausible that the mean number of sick days is at least 5.4, or are you convinced that it is less than 5.4? explain your reasoning.
Answers: 2
Mathematics, 21.06.2019 17:00
How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21
Answers: 1
Mathematics, 21.06.2019 22:10
Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.
Answers: 1
Recently many companies have been experimenting with telecommuting, allowing employees to work at ho...
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