15.7 13.2 22.6 13.0 10.7 18.1 14.7 7.0 17.3 7.5 21.8 12.3 19.8 13.8 16.0 15.5 13.1 20.7 15.5 9.8 11.9 16.9 7.0 19.3 13.2 14.6 20.9 15.4 13.3 11.6 10.9 21.6 a. Hypotheses are: ? b. Find: x, Sx. c. Test statistic? d. Approximate the p-value? e. Decision? 16. A geneticist hypothesizes that half of a given population will have brown eyes and the remaining half will split evenly between blue- and green-eyed people. Use the following sample of sixty individuals to test the geneticist's claim at a 5% level of significance. Brown Eyes Green Eyes Blue Eyes 34 15 a. Hypothesis? b. Degrees of freedom? c. Expected number? d. Test statistic? e. Approximate p-value. f. Decision? g. What is the appropriate distribution? Your choices are: Chi-squared, normal or t-distribution. 17. You are the general manager of a car rental service at the airport. In an effort to estimate the maintenance costs you obtain the following data from a sample of 11 cars. In this data x = number of miles on the car (in thousands) and y = total maintenance cost in dollars. X 3 5 12 8 3 Y 90 150 320 208 98 a. Find the equation of the least squares line. b. Use the least squares line to predict the total maintenance cost of a care with 7,000 miles on it. Final exam date and time: Don't be late. During the final exam, pace yourself, there would not be any additional time given. Thx. 27