Mathematics, 30.11.2019 02:31 lai16kk77
Recently, a group of adults who swim regularly for exercise were evaluated for depression. it turned out that these swimmers were less likely to be depressed than the general population. the researchers said the difference was statistically significant.
a) what does "statistically significant" mean in this context?
b) is this an experiment or an observational study? explain.
c) news reports claimed this study proved that swimming can prevent depression. explain why this conclusion is not justified by the study. include an example of a possible lurking variable.
d) but perhaps it is true. we wonder if exercise can ward off depression, and whether anaerobic exercise (like weight training) is as effective as aerobic exercise (like swimming). we find 120 volunteers not currently engaged in a regular program of exercise. design an appropriate experiment.
Answers: 1
Mathematics, 21.06.2019 22:00
10 points? ? +++ me asap gabriella uses the current exchange rate to write the function, h(x), where x is the number of u.s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a) gabriella averages 7.5 u.s. dollars for every 100 euros. b) gabriella averages 100 u.s. dollars for every 25 euros. c) gabriella can exchange 75 u.s. dollars for 100 euros. d) gabriella can exchange 100 u.s. dollars for 75 euros.
Answers: 2
Mathematics, 22.06.2019 00:10
A, at (-2, 4), is 6 .of a'? (-8, 4) (-8, -2) (-2, -2) (-2, 4) b, at (-4, -7), isy-.of b'? (-4, 7) (4, -7) (4, 7) (-4, -7)
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Mathematics, 22.06.2019 02:00
Gables properties corp. is leasing office building with an area of 49b^2+70b+25. what is the shape of the building? a) rectangle b) square
Answers: 3
Recently, a group of adults who swim regularly for exercise were evaluated for depression. it turned...
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