Probability and Survey Analysis

The video tutorial explains how to calculate the probability of a person having run a red light in the past year based on survey data. It covers the basic concept of probability, the calculation of total outcomes, and how to express probability as a fraction and decimal. The tutorial also demonstrates simplifying fractions and rounding decimals, concluding with a percentage representation of the probability.

What was the main question asked in the survey?

• How many people have never run a red light?

• How many people have run a red light in the last year?

• How many people have run a red light in the last month?

• How many people have run a red light more than once?

What is the formula for calculating the probability of an event?

• Number of favorable outcomes multiplied by total outcomes

• Number of favorable outcomes divided by total outcomes

• Total outcomes divided by number of favorable outcomes

• Number of favorable outcomes minus total outcomes

How many people in total were surveyed?

• 500

• 423

• 211

• 634

What is the probability that a randomly chosen person ran a red light?

• 634/423

• 211/423

• 211/634

• 423/634

What is the first step in simplifying the probability fraction?

• Add the numerator and denominator

• Multiply the numerator and denominator

• Subtract the numerator from the denominator

• Divide the numerator by the denominator

What is the decimal approximation of the probability?

• 0.6629

• 0.6692

• 0.6729

• 0.6672

What is the percentage equivalent of the probability?

• 66.72%

• 66.29%

• 66.92%

• 67.29%

Why is the fraction value considered exact?

• Because it is a whole number

• Because it is not rounded

• Because it is a percentage

• Because it is a decimal

What does the 9 in the decimal 0.6672 indicate?

• Round up

• Exact value

• No rounding needed

• Round down

What is the significance of expressing probability as a percentage?

• It is harder to understand

• It is less accurate

• It is easier to understand

• It is more accurate