6. A market researcher recorded the number of adverts for vehicles in each of three categories on ITV, Channel 4 and Channel 5 over a period of time. The results are shown in the table below.
| ITV | Channel 4 | Channel 5 |
| Family Saloon | 69 | 35 | 28 |
| Sports Car | 20 | 28 | 18 |
| Off-road Vehicle | 12 | 22 | 8 |
- Stating your hypotheses clearly, test at the \(5 \%\) level of significance whether or not there is evidence of the proportion of adverts for each type of vehicle being dependent on the channel.
- Suggest a reason for your result in part (a).