Question

the graph below displays a fire departments response time, which measures the time from when the alarm is sounded at the firehouse to the time the first fire engine leaves the station. which interval accounts for the lowest percentage of response times? 20 - 30 seconds 30 - 40 seconds 70 - 80 seconds 80 - 90 seconds fire department response times

Explanation:

Step1: Understand relative frequency

Relative frequency represents the proportion or percentage of data in each interval.

Step2: Compare relative frequencies

Looking at the bar - graph, the bar for the \(80 - 90\) seconds interval has the lowest height among the given options (\(20 - 30\), \(30 - 40\), \(70 - 80\), \(80 - 90\)). Since relative frequency is plotted on the \(y\) - axis, a lower bar height means a lower relative frequency (and thus a lower percentage of response times).

Answer:

\(80 - 90\) seconds