Question

2.3.3 quiz: two - way frequency tables
a waitress kept track of whether her customers ordered an appetizer and dessert. her data are shown in a relative frequency table.
what does the 0.3 in the highlighted cell mean?
a. 30% of her customers did not order an appetizer.
b. 30% of her customers ordered dessert but no appetizer.
c. 30% of her customers ordered dessert.
d. 30% of the customers who ordered dessert did not order an appetizer.

Explanation:

Step1: Identify row - column meaning

The row is "Dessert" and column is "No appetizer".

Step2: Interpret relative frequency

The relative frequency 0.3 in that cell means the proportion of customers who ordered dessert and no appetizer. As a percentage, 0.3 is 30%. So 30% of her customers ordered dessert but no appetizer.

Answer:

B. 30% of her customers ordered dessert but no appetizer.