Problem involving the confidence interval
To buy a 30-second commercial break during the telecast of Super Bowl XXIX costs approximately $1,000,000. Not surprisingly, potential sponsors wanted to know how many people might be watching. In a survey of 1015 potential viewers, 281 said they expected to see less than a quarter of the advertisements aired during the game. Define the relevant parameter and estimate it using a 90% confidence interval.
Not really sure where to start this one. The "relevant parameter" might be throwing me off a bit, but I feel like a push in the right direction is all I need. Any help is appreciated