Question: The following frequency distribution table shows the orders received by Department A of ABC Mail Order House on December 15 of last year. 5. ABC

The following frequency distribution table shows the orders received by Department A of ABC Mail Order House on December 15 of last year. 5. ABC Mail Order House Orders Department A, December 15 # of Orders Value of Orders 5 $15 to $25 10 $25 to $35 $35 to $45 $45 to $55 $55 to $65 $65 to $75 20 30 20 10 5 $75 to $85 Source: Hypothetical (5 marks) Calculate the arithmetic mean. a. (6 marks) b. Calculate the standard deviation

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