Abiology teacher has just finished grading a quiz for a class of 26 students and has calculated measures of center and spread on the scores. while writing the grades on the quizzes, he realizes he made a mistake, and the highest grade should be 10 points higher. which one of the following sets of measurements will he have to recalculate? (a) the mean and median (b) the mean and standard deviation (c) the median and interquartile range (d) the interquartile range and standard deviation (e) the mean, standard deviation, and interquartile range