The following data shows the number of weekly sales made by a shoe retailer over a 6 week period in 2012: 131, 104, 98, 127, 102, 134.

(a) Using this sales data, calculate the:

(i) Mean number of shoes sold in a week over the period

(ii) Standard deviation of the weekly shoe sales over the period

(iii) Range of the data on weekly shoe sales over the period

 

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