40. Draw more than ogive for the following frequency distribution:
Heights (in cms) / 145-150 / 150-155 / 155-160 / 160-165 | 165-170 | 170-175
Number of persons
8 10 9 15 10 8
Also find the median from the gaph.
Answers
Median = 161.67
Step-by-step explanation:
Class f cf ( more than)
145 - 150 8 8
150 - 155 10 18
155 - 160 9 27
160 - 165 15 42
165 - 170 10 52
170 - 175 8 60
More than ogive
The points with the Lower limits of the class are plotted on x axis and the corresponding more than cumulative frequencies on y axis.
The points are joined by free hand smooth curve to give more than cumulative frequency curve or the More than Ogive
Median = 160 + 5 * (30 - 27)/9
= 160 + 5 * 3/9
= 160 + 5/3
= 160 + 1.67
= 161.67
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