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Quartiles, deciles, and various percentiles.

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The Thomas Supply Company, Inc. is a distributor of small electrical motors. As with any business, the length of time customers take to pay their invoices is important. Listed below, arranged from smallest to largest, is the time, in days, for a sample of The Thomas Supply Company, Inc. invoices.

a. Determine the first and third quartiles.
b. Determine the second decile and the eighth decile
c. Determine the 67th percentile.

13 13 13 20 26 27 31 34 34 34 35 35 36 37 38
41 41 41 45 47 47 47 50 51 53 54 56 62 67 82

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This solutions provide step-by-step calculations for determining quartiles, deciles, and various percentiles.

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