Question

Draw a histogram and frequency polygon to represent the following data :class interval 10-15,15-20,20-25,25-30,30-35 Frequency 4,7,8,10,6

Answer 1

hi,

first write the given values in a table form.
write midvalues for class intervals.
ex:10-15=10+15÷2=12.5

then take graph and draw x and y axis on x axis write class intervals and on y axis write the numbers.write scale on top right.
y axis 1 unit=2cm. mark the frequency on graph (as histogram) and mark midpoints of histogram and join them and then take preceeding class join starting point of frequency polygon to down (I mean to preceeding class interval 0 midpoint) in the same way take suceeding class interval and join end point of frequency polygon.graph completed.

hope it helps.........