To find the total number of people who participated in the survey based on the histogram, we need to add up the frequencies of all bars in the histogram.
The x-axis intervals represent the following time ranges:
- 4 to 7 minutes
- 7 to 10 minutes
- 10 to 13 minutes
- 13 to 16 minutes
- 16 to 19 minutes
- 19 to 22 minutes
- 22 to 24 minutes
According to the problem, there are 7 bars plotted, one for each time interval, with frequencies ranging from 0 to 5.
If we assume that each of the 7 bars has a frequency of 1, it would imply a total of 7 participants. However, if the total frequency of all intervals has values of 5, 4, 3, etc., you'd have to sum those values to find the total number of participants.
The options given are:
- 5
- 18
- 20
- 24
Without knowing the exact frequencies for each interval, I cannot provide a definitive answer. Please derive the total by adding the frequencies from the histogram for each time interval to determine the total number of participants or provide the specific frequencies to analyze.