Answer to Question #63954 in Statistics and Probability for David Njuguna

Question

b) The height of 40 students were measured and recorded as follows;

38.7 40.2 55.4 60.9 70.1 72.5 50.4 63.7
39.4 54.6 59.3 60.2 45.1 66.5 37.9 74.2
44.5 59.6 55.2 60.7 68.0 70.0 71.2 48.3
49.4 54.4 60.9 64.7 69.3 57.4 46.2 68.9
55.3 70.2 71.7 63.2 55.4 39.0 40.3 44.5
Using classes of 35-39, 40-44,- - - calculate;
i. The arithmetic mean
ii. The standard deviation