Use the table below showing the time to solve a puzzle, in seconds, and the frequencies for a sample of 25 persons for questions 6 and 7.
The table below shows the gender and the preferred winter Olympics event for 30 students planning to watch winter Olympics. Suppose that one student is randomly selected from the class. Use this data for questions 9 through 12.
The chart below shows a random sample of 30 people's choice between two sports to watch during the winter Olympics. The gender and the selected sport were recorded and a test of independence is done. Use the table for questions 37 through 40.