Using Survey Results to Predict Population Preferences

The video tutorial explains how to predict the frequency of an event using experimental probability. It begins with a survey example to determine preferences in a school population. The lesson reviews basic calculations of fractions and percentages, then delves into the difference between experimental and theoretical probability. Finally, it applies these concepts to predict outcomes based on survey data, demonstrating how to calculate the expected number of students preferring chocolate ice cream in a school.

If 65% of a group prefers a certain flavor, how would you calculate the number of people in a group of 200 who prefer that flavor?

• Multiply 0.65 by 200

• Divide 200 by 0.65

• Add 65 to 200

• Subtract 65 from 200

What is the probability of rolling a 3 on a standard six-sided die?

• 1/4

• 1/2

• 1/6

• 1/3

Why might a student incorrectly assume they will roll a 3 exactly once in six tries?

• Because 1/6 is the theoretical probability

• Because 3 is the most common number

• Because dice are biased

• Because 6 is an even number

How do you calculate the experimental probability of an event?

• Add the number of successful outcomes to the total number of trials

• Divide the number of successful outcomes by the total number of trials

• Subtract the number of successful outcomes from the total number of trials

• Multiply the number of successful outcomes by the total number of trials

In Chris's survey, what is the predicted number of students who prefer chocolate ice cream in a school of 300?

• 150

• 200

• 165

• 180