The entire gym floor is painted with a giant checkerboard type pattern with alternating blue and white squares each 7 cm x 7 cm. i have a quarter which is 2.4 cm in diameter is dropped from the rafters in the center of the gym and it comes to rest somewhere on the checkerboard grid. find the probability it will land entirely inside one of the 7 cm x 7 cm squares without touching any edge lines.

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.