The following data relates to the annual sales of petrol (in gallons) of eight garages and...
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The following data relates to the annual sales of petrol (in gallons) of eight garages and their expenditure on coupons that they give away to customers. Expenditure on coupons (£'000) 15 5 25 30 20 40 50 55 Sales of petrol (0'000 galls) 35 40 30 45 40 50 25 55 a) Plot a scatter diagram. (First decide which variable is independent.) b) Calculate the correlation coefficient and see whether it is significantly high. c) If appropriate find the least squares regression line. The following data relates to the annual sales of petrol (in gallons) of eight garages and their expenditure on coupons that they give away to customers. Expenditure on coupons (£'000) 15 5 25 30 20 40 50 55 Sales of petrol (0'000 galls) 35 40 30 45 40 50 25 55 a) Plot a scatter diagram. (First decide which variable is independent.) b) Calculate the correlation coefficient and see whether it is significantly high. c) If appropriate find the least squares regression line.
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9 Let expenditure independent variable R 8 y 15 5 25 30 ... View the full answer
Related Book For
Intermediate Accounting
ISBN: 978-0077400163
6th edition
Authors: J. David Spiceland, James Sepe, Mark Nelson
Posted Date:
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