Answer :

Frequency curve is a smooth curve which corresponds to the limiting case of a histogram computed for a frequency distribution of a continuous distribution as the number of data points becomes very large.


Frequency polygons are a graphical device for understanding the shapes of distributions. They serve the same purpose as histograms, but are especially helpful for comparing sets of data.


A histogram is an accurate representation of the distribution of numerical data. It is an estimate of the probability distribution of a continuous variable (quantitative variable).


An ogive, sometimes called a cumulative frequency polygon, is a type of frequency polygon that shows cumulative frequencies. Ogives do look similar to frequency polygons, which we saw earlier. The most important difference between them is that an ogive is a plot of cumulative values, whereas a frequency polygon is a plot of the values themselves.


Ogives can easily estimate median of a given frequency distribution since they are plots of given class and frequency and median can be estimated on x-axis.

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