When should each of the three main types of frequency distri

When should each of the three main types of frequency distribution tables be used?

Solution

If a distribution is symmetrical, the lower half of the distribution mirrors the upper half

in symmetrical distributions, mean, median and mode will be the same (unless it is bimodal)

In skewed distributions, median comes between mean and mode

because mean will be dragged down or up by the few scores out on the extreme tail, while mode will hang out where the greatest action is

If the scores are piled up at the low end, and \"tail off\" near the high end, it\'s positively skewed

If the scores are piled up at the high end, and \"tail off\" near the low end, then it\'s negatively skewed

Positive or Negative by the way the tail points --if tail points to high end, it\'s positive; if tail points towards negative end, it\'s negative