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Old 07-31-2007   #1
BxBmr76
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Default Statistics Distribution Question Help!?

The following distribution shows the prices of books at a college. ClassÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Frequency(Fi) Class Mark(Xi)Â*Â*Â*Â*Â*Â*Â*Â*Â* FiXi10-20Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 10Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 15Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 15020-30Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 15Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 25Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 37530-40Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 15Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 35Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 52540-50Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 20Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 45Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 900sum = 60 = nÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* *Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â *Â* sum = 1950Find:a.The mean: ___________________b.The variance (assume it is a population.): _____________
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Old 03-06-2010   #2
jmw106462

 
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What is up with the A's?
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Old 03-06-2010   #3
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I don't even get what you're saying.
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