Usually because the frequencies at one or both ends of the distribution are very small.
they may be necessary in certain situations to avoid a large number of empty ,or almost empty, classes.
a cumulative frequency graph mearsure the cumulative frequency on the y-axis and the class boundaries on the x-axis
The class is not full.
What is the wall thickness of B class G.I pipe? what is the weight per meter of B class G.I pipe
Usually because the frequencies at one or both ends of the distribution are very small.
they may be necessary in certain situations to avoid a large number of empty ,or almost empty, classes.
Because sometimes adjacent classes have to be merged so that the frequencies are not too small. This is important if anonymity is to be preserved. It is also important for statistical testing.
Real Class Limits are the class intervals of a frequency distribution when stated as in continuous categories. ie. 18.5-19.5, 20.7-34.7 Stated Class Limits are the class intervals of a frequency distribution when stated as discrete categories. ie. 19-21, 23-25
A histogram is "a representation of a frequency distribution by means of rectangles whose widths represent class intervals and whose areas are proportional to the corresponding frequencies.Broken distribution means that no data point falls in that class.
class interval - one of several convenient intervals into which the values of the variate of a frequency distribution may be grouped.
The relative frequency of a class is the frequency of the class divided by the total number of frequencies of the class and is generally expresses as a percentage.
Class Frequency
If, in a frequency distribution, the initial class interval is indeterminate at its beginning and/or the final class interval is indeterminate at its end, the distribution is said to possess "open ended" classes.
Frequency Distribution
Yes.
In a frequency distribution table, there are usually five parts/columns (12th grade statistics):class, frequency, mid-point, relative frequency, and cumulative frequency.