Using Proportions and Two-Way Tables

The video tutorial explains how to conduct a pizza preference survey among students, using two-way tables to analyze data. It covers the concepts of proportions, union, intersection, and complement of events. The tutorial provides examples of reading and interpreting two-way tables, and guides viewers through analyzing survey results to determine pizza preferences. Key learnings include understanding how to calculate proportions and interpret data using two-way tables.

What is the primary goal of the pizza preference survey?

• To assess the nutritional value of pizzas

• To analyze the study habits of students

• To find out the favorite sports of students

• To determine the most popular pizza toppings among students

How do you calculate a proportion?

• Add the number of events to the total outcomes

• Multiply the number of events by the total outcomes

• Divide the number of ways an event can occur by the total possible outcomes

• Subtract the total outcomes from the number of events

In a two-way table, what does the bottom right cell represent?

• The sample size of the survey

• The total number of females surveyed

• The total number of males surveyed

• The number of students who prefer sports

What is the intersection of two events?

• Outcomes that occur in either one event or the other

• Outcomes that occur in both events

• Outcomes that do not occur in either event

• Outcomes that occur in neither event

How many students preferred meat or thin crust?

• 24 students

• 11 students

• 32 students

• 19 students

What is the least favorite pizza according to the survey?

• Veggie on thin crust

• Cheese on thick crust

• Veggie on thick crust

• Meat on thin crust

What percentage of students did not prefer veggie pizza?

• 93%

• 75%

• 41%

• 50%