Mathematics, 17.04.2020 10:21 adamkinney9345
The data sets give the number of platinum albums for the five male artists and the five female artists in the United States with the most platinum albums through 2015.
Without calculating, which data set has the greater mean for each group? Why?
Verify your conjecture from #1 by calculating the mean number of platinum albums for each data set.
Without calculating, which data set has the greater standard deviation for each group? Why?
Verify your conjecture from #3 by calculating the standard deviation for each data set.
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Answers: 1
Mathematics, 20.06.2019 18:04
Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?
Answers: 2
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Mathematics, 21.06.2019 20:30
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The data sets give the number of platinum albums for the five male artists and the five female artis...
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