Reef Office Supplies is interested in estimating the relationship between customer service costs and sales. The following
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Question:
Reef Office Supplies is interested in estimating the relationship between customer service costs and sales. The following data are available:
a. Display a scattergraph/scatterplot of customer service cost (vertical axis) and sales (horizontal axis).
b. Comment on whether there appears to be a linear relation between cost and sales and whether any of the observations appear to be outliers. Indicate which month if any may be an outlier and explain why in complete sentences.
| Month | Customer Service Cost | Sales |
| May | $9,900 | $255,000 |
| June | $10,100 | $210,000 |
| July | $10,690 | $230,000 |
| August | $12,750 | $255,000 |
| September | $13,830 | $275,000 |
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