Question

The times taken for a group of people to

complete a race are shown below.
Estimate the number of people who took
longer than 325 minutes to complete the
race.
Cumulative frequency
250-
200-
150-
100-
50-
0
Time to complete a race
100 200 300 400 500
Time (minutes)

Answer 1

To estimate the number of people who took longer than 325 minutes to complete the race, we can use the cumulative frequency distribution. We can estimate that the number of people who took longer than 325 minutes to complete the race is approximately 100.

Step-by-step explanation:

To estimate the number of people who took longer than 325 minutes to complete the race, we can use the cumulative frequency distribution.

The cumulative frequency represents the total number of people who took less than or equal to a certain time. In this case, we can see that the cumulative frequency for 300 minutes is 100, which means that 100 people took 300 minutes or less.

Since the cumulative frequency for 325 minutes is not given, we can estimate it by finding the difference between the cumulative frequencies for 300 minutes and 400 minutes. The difference is 100, which means that we can estimate that 100 people took between 301 and 400 minutes to complete the race.

Therefore, we can estimate that the number of people who took longer than 325 minutes to complete the race is approximately 100.