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# A student is testing the lasting time of some lightbulbs, is

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Joined: 21 Aug 2004
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A student is testing the lasting time of some lightbulbs, is [#permalink]  26 Sep 2004, 23:05
A student is testing the lasting time of some lightbulbs, is mediam greater than mean
a. more than 25% of then lastlonger than 4000 hours
b. less than 50% of them last under 1000hrs
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Joined: 31 Aug 2004
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I think the answer is E

with A+B we just can say that 50% of the bulbs are lasting from 0 to 999h
25% from 1001 to 3999h
25% above 4000
It's impossible to assess any median and mean relation with so few data...
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