Mean from Frequency Tables Flashcards

A table that shows how often each value or group of values occurs in a data set.

The average of a set of numbers, calculated by dividing the total of all values by the number of values.

For each row in the frequency table, multiply the value (or midpoint for grouped data) by its frequency.

Add up all the products from Step 1 to get the total of the values.

Add up all the frequencies in the table to get the total number of data points.

Divide the total of the products (Step 2) by the total frequency (Step 3).

A frequency table where data is grouped into intervals (e.g., 0-10, 10-20).

The value halfway between the lower and upper bounds of a group. Used as the representative value for that group.

Exact values are not known in grouped data, so midpoints are used as an estimate for each group.

Mean = (Sum of values × frequencies) ÷ Total frequency.