Listed below are amounts of bills for dinner and the amounts of the tips that were left. Construct a scatterplot, find the value of the linear correlation coefficient r, and find the P-value of r. Determine whether there is sufficient evidence to support a claim of linear correlation between the two variables. Use a significance level of α = 0.01. If everyone were to tip with the same percentage, what should be the value of r?
Bill (dollars) 31.62 52.20 90.36
99.42 60.70 100.52
Tip (dollars) 3.90 10.40 8.62 18.13 10.60 12.95
Construct a scatterplot
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