Determine the coefficient of skewness

Assignment Help Basic Statistics

Reference no: EM132228364

Question # 1 Kevin Horn is the national sale manager for National sales manager for national Textbook Inc. He has a sale staff of 40 who visit college professors all over the United States. Each Sunday mornings he requires his sales staff to send him a report. The reports include, among other things the number of professors visited during the previous week. Listed below, ordered from smallest to largest, are the number of visits last week.

38,40,41,45,48,48,50,50,51,51,52,52,53,54,55,55,55,56,57,
59,59,59,62,62,62,63,64,65,66,66,67,67,69,69,71,77,78,79,79
Determine the median numbers of thecells_______

A. Determine the First quartiles ________ and Third quartiles_________(Round Q1 to 2 decimal places and Q3 to nearest whole number)

B. Determine the first decile ______, ninth decile______ ____ (Round your answer 1 decimal place)

C. Determine the 33rd percentile (roundyour answer two decimal places)

Question # 2 List below are the commissions earned ($000) last year by a sample of 15 sales representatives at Furniture Inc

$4.4, $ 6.2, $ $8.2, $ 11.5, $ 12.7, $13.6, $ 14.3, $ 15.7, $17.3, $17.4, $18.4, $22.3, $ 35.7, $43.20, $ 78.1

A. Determine the mean _______, median ________and standard deviation _________ (Round your answers to decimal to decimal places)

B. Determine the coefficient of skewness____________ using Pearson ‘s method (Round your answer to 3 decimal places)

C. Determine the coefficient of skewness using the software method (Round your answer to 3 decimal places)

Question # 3
The Thomas Supply Company, Inc. is a distributor of gas-powered generators. As with any business, the length of time customers takes 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

13,13,13,20,26,26,27,31,34,34,35,35,36,37,38,41,41,41,42,43,44,47,48,49,51,55,56,62,67,82

A. Determine the first quartile _________ and third quartiles _______

B. Determine the second decile _________ and the eight deciles________

C. Determine the 67 percentiles

Reference no: EM132228364

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