History Grades In a history class, the grades for various assessments are all positive numbers and have different distributions. Determine whether the grades for each assessment could be normally distributed. Explain your reasoning. a quiz with a mean of 33, a 40th percentile of 30, and a 60th percentile of 39 a homework assignment with a mean of 19, a 10th percentile of 7, and a 90th percentile of 31