Exploring Percent Error Calculations

The video tutorial introduces the concept of percent error, explaining how it measures the accuracy of predictions by comparing estimated and actual values. It provides real-life examples, such as weather forecasting and economic trends, to illustrate the importance of accurate predictions. The tutorial then details the calculation of percent error, using examples to demonstrate the process. Viewers are encouraged to practice with exercises, including a jelly bean prediction task, to apply their understanding of percent error calculations.

What is the main topic of today's lesson?

• Weather Forecasting

• Percent Error

• Stock Market Trends

• Traffic Conditions

Which of the following is an example of making a prediction?

• Estimating the number of jelly beans in a jar

• Reading a book

• Cooking a meal

• Playing a video game

Why is accuracy important in making predictions?

• To ensure predictions are as close to the actual value as possible

• To make predictions faster

• To make predictions more interesting

• To confuse people

How do you calculate percent error?

• Subtract the change from the actual number

• Multiply the change by the actual number

• Divide the change by the actual number

• Add the change to the actual number

In the example with Alice, what was the actual number of passengers on the bus?

• 50

• 40

• 45

• 36

What is the percent error if the estimated value is 40 and the actual value is 45?

• 11.1%

• 10%

• 13.3%

• 12.5%

In the second example, what is the percent error if the estimated value is 63 and the actual value is 75?

• 18%

• 12%

• 20%

• 16%

What is the percent error if the estimated value is 125 and the actual value is 99?

• 25%

• 28%

• 26%

• 27%

What was the actual number of jelly beans in the jar?

• 100

• 125

• 80

• 150

If your prediction for the jelly beans was 80, what would be your percent error?

• 36%

• 28%

• 40%

• 32%