You have 102 samples therefore the median will be in between the 51st and 52nd values. You are correct to say it lies in the 60-69 range.
Ok here is the table I am given.
Mark Intervals Number of Learners
30-39 2
40-49 5
50-59 20
60-69 42
70-79 25
80-89 5
90-99 3
Then I did the a cumulative frequency and represented the data on an Ogive.
I was then asked to read off the Median from the Ogive which was also straight forward.
Then I was asked to calculate the ACTUAL median.
Any help on how to calculate it?
What I did was (100 + 1)/2 and got 50.5th value which would be in the 60-69 interval and I gave that as my answer? Is that correct? If not, how would I do this problem.
Thanks for the help in advance