1. The following represents the grade of the students sitting in Mrs. Marson's period 3 grade 9 class. Round all values to 2 decimal places where applicable. # of a) Determine the mean. (3 marks) Mark (%) students 59.5 - 69.5 1 69.5 - 79.5 8 79.5 - 89.5 b) Determine the mode interval. (1 mark) 5 89.5 - 99.5 10 c) Indicate the outlier value and how it affects your calculations. (1 mark)