1000 students participated in a survey on a university campus about their tv watching habits. all
respondents said they watched tv at least at some point during the day. 27% stated that they only
watched television during prime time hours (8pm - 10pm.) and 61% stated that they spend prime time
hours in their dorm rooms.

What situation is an example of an observational study

Can some one me with these questions

Juanita wade's new car has an msrp of $28,902.11 including title and processing fees. the premier package which includes surround sound and dvd player costs three times the amount of the in-style package which includes leather seats and select wheels. the total cost of her new car was $34,290.08 which included the 6.5% sales tax. find the cost of the premier package to the nearest cent.