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PS - Stat

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Senior Manager
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Joined: 05 Jun 2008
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PS - Stat [#permalink]

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New post 15 Sep 2008, 07:00
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Can some explain how to approach these kind of questions
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Senior Manager
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Joined: 09 Oct 2007
Posts: 463
Re: PS - Stat [#permalink]

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New post 15 Sep 2008, 07:45
You can either:

-- Write down all the number of hours each employee worked (1,1,1,1,1,1,1,1,1,1,2,2,2,2,3,4,4,5,6,6,6,6,6........) and then find the median (6 in this case).

-- or you can do it in your head and save some time:
If you have 35 employees, that means that the median will be employee No. 18. then start adding from either side (right to left works better on this one) until you add up to 18 employees: You have 10 who work 7 hours (need 8 more) + 8 who work 6 hours and you are done, because you already reached 18. Median of hours worked is 6.

Note that sometimes the data will not be ordered and the first approach could help you avoid some confusion.
Re: PS - Stat   [#permalink] 15 Sep 2008, 07:45
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