The probability that Rahul succeeds at any given free-throw is 70%. He was curious how many free-throws he can expect to succeed in a sample of 15 free-throws. He simulated 30 samples of 15 free-throws where each free-throw had a 0.7 probability of being successful. Rahul counted how many free-throws were successful in each simulated sample. Here are his results: Use his results to estimate the probability that he succeeds at 11 or fewer free-throws in a sample of 15 free-throws.

Convert the cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation. choices: r4 = -4r2 r2 = 4cos2θ r2 = 4sin2θ

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

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.