Understanding Percentile Ranks in Dot Plots

The video tutorial explains how to interpret a dot plot showing the daily driving hours of school bus drivers. It focuses on calculating the percentile rank for a driver with 6 hours of driving time. Two methods of calculating percentiles are discussed: one considering data below the target value and another including the target value. The tutorial demonstrates the calculation process, leading to the conclusion that the 55th percentile is the closest estimate for the given data point.

What does each dot represent in the dot plot discussed in the video?

• A day of the week

• A school bus

• A school bus driver

• An hour of driving

How many drivers drive 7 hours a day according to the dot plot?

• One driver

• Two drivers

• Five drivers

• Seven drivers

What is the main problem discussed in the video?

• Identifying the driver with the most hours

• Estimating the percentile rank for a driver with 6 hours of driving

• Finding the average driving time

• Calculating the total driving hours

What is one method to calculate percentile rank mentioned in the video?

• Percentage of data multiplied by the amount

• Percentage of data equal to the amount

• Percentage of data below the amount

• Percentage of data above the amount

What is the second method to calculate percentile rank discussed?

• Percentage of data multiplied by the amount

• Percentage of data above the amount

• Percentage of data at or below the amount

• Percentage of data equal to the amount

How many drivers have a daily driving time below 6 hours?

• Eight drivers

• Seven drivers

• Six drivers

• Five drivers

What is the percentile rank of a driver with 6 hours of driving using the first method?

• 55th percentile

• 40th percentile

• 45th percentile

• 50th percentile

What is the approximate percentile rank using the second method?

• 60th percentile

• 50th percentile

• 55th percentile

• 65th percentile

Which percentile rank is closest to the one calculated in the video?

• 65th percentile

• 60th percentile

• 55th percentile

• 50th percentile

What choice did the video suggest as the correct percentile rank?

• 50th percentile

• 55th percentile

• 60th percentile

• 65th percentile