Australia has decided to run a quasi-experiment in regard to a new program to reduce shark attacks, with the knowledge that shark attacks are correlated with ice cream consumption. Several beach-side cities are randomly assigned to a reduced ice cream program, and a number of other beach-side cities are assigned to a control group. By follow-up interviews, the state finds out how many shark attacks per season occur on average, by each city with the following results: Reduced Ice Cream Program Control Mean 7.5 5 Std Dev 1.3 1 n 25 81 a. Present a hypothesis and a null hypothesis. b. Calculate your t-score (involving the overall standard error for the difference of means); show your work. c. estimate your p-value (using n1+n2-2 for d.f.); d. State a conclusion in plain English. Is the result statistically significant? Is it practically significant