Weekly income
Less than $200
$200 but less than $300
$300 but less than $400
$400 but less than $600
$600 or more
Calculate

Arithmetic mean
Median
Mode
Number of Workers
10
28
42
50
20
(4 marks)
(4 marks)
(4 marks)
Standard deviation
(4 marks)
Coefficient of Skewness and use a suitable graph/diagram to indicate the skewness
and how the mean, median and mode are related
(4 marks)