... tendency? a mean, median, and mode b mean, variance, and standard deviation c mean, median, and variance d mean, median, and standard deviation e first quartile, second quartile, and third quartile ... following data values: 7, 5, 6, 4, 7, 8, and 12? a The mean, median, and mode are all equal b Only the mean and median are equal c Only the mean and mode are equal d Only the median and mode are ... that the histogram of a data set is symmetric and bell shaped, with a mean of 75 and standard deviation of 10 Then, approximately 95% of the data values were between 55 and 95 a True b False ANSWER:...