1. Organize these traffic light waiting times (in seconds) into five uniform intervals then construct a table with frequencies, use the table of values to calculate:
- a) mean, median, mode, and standard deviation
- b) construct a box-and-whisker plot
0, 1, 1, 2, 3, 4, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 10, 11