In addition to age grouping information, the audiences interviewed were also asked if they had seen the movie before (Never, Once, More than Once). The two-way contingency table shows the results.

under 6	6 to 9	10 to 14	15 to 21	over 21
never	39	60	84	16	151
once	3	20	38	2	15
more than once	3	3	32	0	4

• Find the marginal distributions of their previous viewing of the movie.
• Verify that the marginal distribution of the ages is the same as that given previously.
• Find column percentages.
• Looking at these percentages, does the distribution of how many times someone has seen the movie look the same for each age group?
• Make a stacked bar chart showing the distribution of viewings for each age level