MINI LESSON
Frequency Tables
A two-way frequency table organizes data by two categories.
You can use row totals, column totals, and the grand total to answer questions about counts and percentages.
To find a percentage, divide the part by the whole and multiply by 100.
Be careful to use the correct whole when the question says 'of the students who chose...' or 'of all the pizzas sold...'.
Question 1
A survey of students at West High School was taken to determine a theme for the prom. The results of the survey are summarized in the table below. Approximately what percentage of the students who chose the Broadway theme were girls?
Question 2
Market Street Pizza kept a record of pizza sales for the month of February. The results are shown in the table below. Of all the pizzas sold in February, what percent were plain, deep-dish pizzas?