T 30. Golf courses. One measure of the difficulty of a golf course is its length: the total distance (in yards) from tee to hole for all 18 holes. Here are the histogram and summary statistics for the lengths of all the golf courses in Vermont. 8 6 # of VT Golf Courses 4 2 5000 500 6000 6500 Total Length (yd)a) What is the range of these lengths? b) Between what lengths do the central 50% of these courses lie? c) What Summary statistics would you use to describe these data? d) Write a brief description of these data (shape, center, and spread). 34. SAT scores. Here are the summary statistics for Verbal SAT scores for a high-school graduating class. a) Create parallel boxplots comparing the scores of boys and girls as best you can from the information given. b) Write a brief report on these results. Be sure to dis cuss shape, center, and spread of the scores. 38. Rainmakers? In an experiment to determine whether seeding clouds with silver iodide increases rainfall, 52 clouds were randomly assigned to be seeded or not. The amount of rain they generated was then measured (in acre-feet). Mean Median SD IQR Q1 Q3 Unseeded 26 | 164.59 44.20 278.43 | 138.60 24.40 163 Seeded 26 |441.98 | 221.60 | 650.79 | 337.60 | 92.40 1 430 a) Which of the summary statistics are most appropri- ate for describing these distributions. Why? b) Do you see any evidence that seeding clouds may be effective? Explain