Question

fill in the blank. a ____ histogram has the same shape and horizontal scale as a histogram, but the vertical scale is marked with relative frequencies instead of actual frequencies. a ____ histogram has the same shape and horizontal scale as a histogram but the vertical scale is marked with relative frequencies instead of actual frequencies. polygon back - to - back relative frequency normal distribution

Explanation:

A relative - frequency histogram has the characteristics described, where the vertical scale represents relative frequencies (proportions or percentages) instead of actual counts (frequencies). Other options like polygon, back - to - back, and normal distribution do not match this description.

Answer:

relative frequency