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The sum of a complete set of relative frequencies will be 100.
Assuming the products are created from a dataset which contains each value once or more times by multiplying the each value by its frequency in the dataset, then the result of sum of products (of values by their frequencies) divided by sum of frequencies is the mean average of the all the values in the dataset.
Data representation. Cumulative frequency is the sum of all previous frequencies.
An ogive is a type of graph that is used to represent the cumulative frequencies for the classes in a frequency distribution. This type of graph can also be known as a cumulative frequency graph. The cumulative frequency is the sum of the frequencies accumulated up to the upper boundary of a class in the distribution.
If three pure signals with frequencies of 100, 200, and 500 Hz are added, their sum is a signal with afrequency of 100 Hz, which has additional "wiggles" superimposed on its shape. The wiggles appear ingroups of 2 per cycle and 5 per cycle on the main signal; their exact shape and depth is determined bythe relative amplitudes of the three individual component signals.