Question 1
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A manager of a factory purchases a large number of sheets of aluminium, all of them longer than 100 cm in length. Each piece is then cut so that it is 100 cm long. The length of a sample of the off-cuts, in cm, resulting from cutting the lengths to size are given below:
5,2 6,6 3,5 8,9 7,5
7,3
Using the data above:
Calculate the standard deviation of the lengths rounded to 1 decimal place
0 3,6
о 3.7
O 1.9
о 1.7