Topic: grouped data list of topics
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	The range in grouped data		2012-08-27
		From maria: Question from maria, a student: how to find range from group data.?i know that it is the difference between largest and smallest value.but confuse to find range of group data e.g class interval frequency 0------5 6 5------10 7 10------15 9 15------20 4 Answered by Robert Dawson.
	Statistics from grouped data		2003-10-09
		From Rebecca: I have to use a suitable computer package (ie. Excel) to work out the mean and standard deviation of the following: Price Range No of Houses No of Houses £`000 Area 1 Area 2 45 and under 50 4 5 50 and under 55 7 12 55 and under 60 14 16 60 and under 70 19 18 70 and under 80 8 3 80 and under 100 5 2 I have used excel to work out mean and standard deviation before, but not in a more complicated example like this. Any advice on where to start would be greatly appreciated. Answered by Penny Nom.
	Variance		2002-10-29
		From Ade: I am trying to solve a standard deviation question, I have 30 data points to use, should I group the data before solving for variance or should I just use the raw data. Answered by Andrei Volodin.

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