HistNQuiz

Mean and Median	Investigate Six Example Data Sets from the DASL project Take the *Quiz*
*The Investigations:*
Load each of the six sets of data. Click *Sort* to order the data values. Compare the *mean* and the *median* for each data set. Are the *mean* and the *median* always equal to data values?	Plot histograms for each data set. Click on data values near the *mean* and the median. Are they in the tallest bar of the histogram? Highlight then delete the highest value from a data set. Replace it with a value 10 times greater. Press *Sort, then check the mean* and *median* again.

Highlight then delete the lowest value from a data set. Replace it with a value 1/10 of the original. Press *Sort, then check the mean* and *median* again.	Load a small set of data values (or click *Clear* and replace them with some of your own). Note the *mean* and the *median. Now add 5 to each data value. Check the mean* and *median* again. How did they change?	Load a small set of data values (or click *Clear* and replace them with some of your own). Note the *mean* and the *median. Now double each data value. Check the mean* and *median* again. How did they change?
	Click *Clear* and enter 10 data values which are all the same. Check the *mean* and median.

You've done the Investigations, now try the QUIZ!