Select all the correct answers. a supermarket is testing brands of microwave popcorn. for each brand, they recorded the percentage of corn kernels in a package that popped in the recommended cooking time. let a be the data set of percentages listed below. a = {91, 94, 89, 93, 87, 92, 86, 87, 92, 91} the supermarket then realized they missed a brand. when the new brand was cooked, only 74% of its kernels popped. let b be the data set of percentages for all 11 packages, including the package where the least kernels popped. select the statements that are true. the mean of a is the same as the mean of b. including the percentage for the package where the least kernels popped causes the center of the data to increase. the standard deviation of b is greater