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A what uses bars to represent the frequency of data that have been organized in intervals?
If the intervals are of different width, then it is a histogram.
What table is used to group data into intervals?
Frequency Distribution Table
How do you get the missing values in the cumulative frequency table when only the class intervals are given?
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How is a frequency curve in statistics different from a frequency polygon?
In order to plot the points on either the frequency polygon or curve, the mid values of the class intervals of the distribution are calculated. Then the frequencies with respect to the mid points are plotted. However in a frequency curve the points are joined by a smooth curve, where as in a frequency polygon the points are joined by straight lines. Apart from this major difference, a frequency polygon is a closed figure where as the frequency curve is not.
When creating a frequency table the intevals must be what?
The intervals must be of EQUAL SIZE.That is, if I have a data set of numbers ranging from 1 to 20, I might create 4 intervals of 5 each, because 20 divides by 5 evenly. So I would get a table:---------------------------------------------| Interval | Tally | Frequency |---------------------------------------------| 1-5 | | || | | || 6-10 | | || | | || 10-15 | | || | | || 15-20 | | |---------------------------------------------
