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05 May 2005, 01:45
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In 1985 a consumer agency concluded that Xylo brand bicycles are safer to ride than are Zenon brand bicycles. The agency based the conclusion on the ratio of the number of rider injuries to the number of riding hours for each brand of bicycle from 1981 through 1984. Yet for identically designed bicycles manufactured since 1985, the number of rider injuries has been twice as great among riders of Xylos as among riders of Zenons. Therefore, the agency's conclusion would have been different for the period since 1985.
Q.Which of the following is an assumption that, if true, supports the claim that the agency's conclusion would have been different for the period since 1985?
A.For the period since 1985, the number of riding hours for Zenons totaled at least half the number of riding hours for Xylos.
B.Of all the bicycles ridden in the period since 1985, the percentage of Xylos ridden was twice the percentage of Zenons ridden.
C.Prior to 1985, Zenon owners were more likely than Xylo owners to report the injuries they sustained while riding their bicycles.
D.In 1985 the agency had miscalculated the ratio for Xylos, for Zenons, or for both.
E.Soon after the agency had issued its report, consumer demand for Xylos increased more rapidly than did consumer demand for Zenons.
Q.Which of the following is an assumption that, if true, supports the claim that the agency's conclusion would have been different for the period since 1985?
A.For the period since 1985, the number of riding hours for Zenons totaled at least half the number of riding hours for Xylos.
B.Of all the bicycles ridden in the period since 1985, the percentage of Xylos ridden was twice the percentage of Zenons ridden.
C.Prior to 1985, Zenon owners were more likely than Xylo owners to report the injuries they sustained while riding their bicycles.
D.In 1985 the agency had miscalculated the ratio for Xylos, for Zenons, or for both.
E.Soon after the agency had issued its report, consumer demand for Xylos increased more rapidly than did consumer demand for Zenons.
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05 May 2005, 02:18
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I pick A.
A cycle is safer than the other if
(Injuries / cycle time ) is minimum.
Now conclusion for 1985 would be diff => Xylo are not safer than Zenon.
In 1985, Injuries by Xylos > Injuries by Zenons
=> Riding hours for zenons => riding hours of xylos
ie. riding hours for Zenons totaled at least half (or more) the number of riding hours for Xylos.
A cycle is safer than the other if
(Injuries / cycle time ) is minimum.
Now conclusion for 1985 would be diff => Xylo are not safer than Zenon.
In 1985, Injuries by Xylos > Injuries by Zenons
=> Riding hours for zenons => riding hours of xylos
ie. riding hours for Zenons totaled at least half (or more) the number of riding hours for Xylos.
