The Government of Malaysia has ended the petrol and diesel subsidies that were introduced in December 1, 2014. The government sets pump prices based on the average cost of refined oil (MOPS fuel) of the preceding month. David is studying the petrol price flows for RON95. He selects petrol prices from the last 10 months (June 1, 2016 to March 1, 2017) for his study. The list of the price (in RM per liter) for RON95 is as follows:

2.3 2.3 2.1 1.9 1.95 1.8 1.7 1.75 1.75 1.7

a. Compute the variation between the highest and the lowest price per liter for RON95.

b. Compute the standard deviation for the price per liter for RON95.

c. By using the findings in parts a and

b, write a short report for David on the dispersion of the price per liter for RON95.