Statisticsmedium · Past Paper
In the formula for median of grouped data $L + \frac{\frac{N}{2} - cf}{f} \times h$, what does 'cf' represent?
AFrequency of median class
BCumulative frequency of the class preceding the median class
CCumulative frequency of the median class
DTotal frequency
✓ Correct Answer: B — Cumulative frequency of the class preceding the median class
By definition, 'cf' is the cumulative frequency of the class just before the median class.
Share this question
More from Statistics
- What is the probability of a certain event?
- If the ratio of mode and median of a distribution is 6:5, then the ratio of mean and median is:
- The mean of 20 observations is 15. On checking, it was found that two observations 20 and 15 were miscopied as 3 and 32. The correct mean is:
- For which data set is the mean, median, and mode all equal to 3?
- Find the median of 10, 10, 10, 10, 10.