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4 8 po The Boston Security Analyst Society Inc BSAS is a nonprofit association that...

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4 8 po The Boston Security Analyst Society Inc BSAS is a nonprofit association that serves as a forum for the exchange of ideas for the investment community Suppose the ages of its members are based on the following frequency distribution Age Frequency Midpoint m m fi From 18 to 25 From 25 to 35 From 35 to 45 From 45 to 55 From 55 to 65 From 60 to 90 5 14 42 29 23 17 m x fi note fill in the table correctly and completely to receive full credit a Use the summarized data to find out the average age of members 2nd decimal place b What is the sample variance and standard deviation of member s age 2nd decimal

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