After constructing a relative frequency distribution summarizing iq scores of college students, what should be the sum of the relative frequencies?

a. if percentages are used, the sum should be a 100%. if proportions are used, the sum should be 1.
b. if percentages are used, the sum should be 1%. if proportions are used, the sum should be 100.
c. if percentages are used, the sum should be 0. if proportions are used, the sum should be 0.
d. if percentages are used, the sum should be 100%. if proportions are used, the sum should be 100.

Explanation:

The relative frequency can be measured as a ratio (proportion) or as a percentage.

As a ratio, the relative frequency is the number of times that the desired outcome is observed (either theoretically or experimentally) divided by the total number of  possible outcomes (theoretically) or  observed (experimentally).

As a percentage, the relative frequency is the ratio multiplied by 100.

This shows it mathematically:

                                       = sum of all (n) frequencies / number of events =

                                       = number of events / number of events = 1

As a percentage, total relative frequency = 1 × 100 = 100

answer: the two figures are congruent.

step-by-step explanation: they're congruent because figure efgh is reflected across the x and y axis but it was also rotated.

hope it !