B4. Listed below are the commissions earned ($000) last year by a sample of 15 sales representatives at Furniture Patch Incorporated. Commissions 4.5 16.9 15.1 6.3 17.4 7.6 18.9 10.9 22.3 b) Determine the first and third quartiles. 12.1 35.5 13.6 43.2 14 79.1 a) Determine the mean, median, and standard deviation. (Enter your answers in thousands and round your answers to 2 decimal places.) c) Determine the coefficient of skewness using Pearson's method. (Round your answer to 3 decimal places.)

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A: As per our guidelines I can solve only first one question. Kindly post the remaining question again.

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A: Here, n = 70, CL = 0.99, x=28, and σ=3.8

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