A High performance Tailoring company "Shawapna" at Mirpur sampled its delivery records (in days) for 8 customers: 3 11 7 10 11 6. 12 a. What was the average delivery period for the tailoring company?...

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Extracted text: A High performance Tailoring company "Shawapna" at Mirpur sampled its delivery records (in days) for 8 customers: 3 11 7 10 11 6. 12 a. What was the average delivery period for the tailoring company? Answer in exact fraction, or rounded to at least 4 decimal places b. Determine the variance in the delivery records. Answer in exact fraction, or rounded to at least 4 decimal places