Question

Q7. Draw a more than ogive for the following distribution and hence find its
median.
Class
20-30 30 – 40
40-50
50 – 60 60 - 70 | 70 - 80
80 - 90
Frequency
25
15
10
24
12
8

Answer 1

Answer:

median =57

hope it helps

Answer 2

Median of the given frequency table is 47.

• More than ogive curve is the curve drawn using more than cumulative frequencies.
• Lower limits of classes are taken on X-axis and cumulative frequencies are taken on Y-axis.
• Curve is drawn by plotting more than cumulative frequencies against the  lower class limits.
• We get a falling curve in this case.

Finding median:

• Find N/2 = 94/2 = 47.
• Draw a horizontal line from Y-axis at 47 such that it meets the curve.
• Drop a perpendicular from this point to X-axis.
• The value on X-axis where this perpendicular meets is median.
• In this case, median = 47.