(a) To calculate mean use the formula
where n = total number of observations
For company A , mean
For company B, mean
To calculate median arrange the observations in ascending order . Find the observation , which is the median
For company A : n=10 which is even. Therefore there are two middle observations 5th and 6th . The average of these two is the median. The 5th and 6th observations are 7 and 8 . Average of these
Therefore, median for company A = 7.5
For company B : The 5th and 6th observations are 10.2 and 10.2
Therefore median for company B = 10.2
b) Plot of measure of flexibility of two companies is shown below:
The plot shows that the steel rods supplied by company B are more flexible than that of company A.
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