The following data set gives the Life Orientation marks of a sample of Matric students who applied for university admission. LO marks XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX (a) Calculate the arithmetic mean...

The following data set gives the Life Orientation marks of a sample of Matric students who applied for university admission.

LO marks
84 76 80 93 81
68 69 59 76 73
66 60 53 51 78

(a) Calculate the arithmetic mean (average).
(b) Find the mode.
(c) Find the median.
(d) Calculate the sample variance.
(e) Find the value of first quartile .Q1/.
(f) Find the value of the third quartile .Q3/:
(g) Draw a box plot for the data.
(h) Find the 90th percentile of the data set.