Why is a red vertical line placed at 9 on the histogram?

Conditions

• The barbecue is in 9 hours.
• The line marks the threshold on the horizontal axis.

Reasoning, step by step

1. Add the vertical line using `plt.axvline(9, color = 'r')`.
2. Observe that the region to the right of the line corresponds visually to the event `duration > 9`.

Example

The typed code is `plt.axvline(9, color = 'r')`. The speaker says the barbecue is in 9 hours and the line helps visualize whether "the total time to complete both reports exceeds that threshold."

Common misconceptions

• Assuming the line represents the mean or median of the distribution.
• Thinking the line indicates the probability of finishing exactly at 9 hours.

Watch the explanation

Explore next

• How does the video estimate the probability that total time exceeds 9 hours?
• What numerical probability does the simulation output for missing the barbecue?
• What is the estimated probability of exceeding the 9-hour deadline?