Given:
Data was collected for 289 randomly selected 10-minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall was recorded. The data is summarized in the table below.
Number
of Guests Frequency
180 – 18463
185 – 18951
190 – 19473
195 – 19945
200 – 20457
Required:
Find the class width for the given frequency table.
Explanation:
The class width is the difference between the lower class and the upper-class boundaries.
For the first interval
lower class boundary = 180
upper-class boundary = 184
Class width = 184 - 180 = 4
Similarly for the second interval
Class width = 189 - 185 = 4
So we can observe from the table that the class width for each interval in the table is the same.
Final Answer:
The class width for the given frequency table is 4.
