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1. Recall the cross-tabulations for the car ads example discussed in Lecture 1. -> ad - Power sex recall Female Male Total No1 Yes 53 17 331 26 | 86 43 Total 70 59 129 -> ad Safety sex Female Male 1 Total recall 79 No Yes I 25 36 541 10 46 61 125 64 ! Total! Among those that recalled the safety ad, what fraction are female? (Round your answer accurate to at least the nearest second decimal place and answer as a fraction, not a percent; for example, answer as 0.50, not 50 percent.)

2. A university admits 16,013 new students. Of these, 12% have transferable credits and 88% have no transferable credits. Among those with transferable credits, 60% have credit for calculus. How many new students have credit for calculus? (Answer with the number of students. Record your answer to the nearest integer.)

3. For restaurants that have been open less than one year, suppose y = 1,223 + 98*x where x is how many days the restaurant has been open and y is its total revenues, in dollars, last month. For each additional week a restaurant has been open, we observe total revenues last month that are dollars higher. (Record your answer as an integer.)