Question

Organize the following marks in a class assessment, in a tabular form: 4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7.

(i) Which number is the highest? 

(ii) Which number of the lowest?

(iii) What is the range of the lowest?

(iv) Find the arithmetic mean

Answer 1

(i) The highest number is 9. 

(ii) The lowest number is 1.

(iii) The range of the data is 9 – 1 = 8 

(iv) Arithmetic mean =

= 100/20 = 20