- AOnly when the frequencies of the classes just before and just after the modal class are equal (f0 = f2)
- BAlways, since mode is the mid-point of the modal class
- COnly when f1 is even
- DOnly when the class size is 10
Step-by-Step Solution
Mode = (the mid-point) exactly when , because then the formula's fraction is . Otherwise the mode is shifted toward the heavier neighbouring class.
Answer: A) Only when the frequencies of the classes just before and just after the modal class are equal (f0 = f2)