Can the consumption of water in a city be predicted by air temperature? The following data represent a sample of a day’s water consumption and the high temperature for that day.
Water Use Temperature
(Millions of gallons). (Degrees Fahrenheit)
219 ......... 1030
56 ......... 39
107 ........ 77
129 ........ 78
68 ......... 50
184 ........ 96
150 ........ 90
112 ........ 75
Develop a least squares regression line to predict the amount of water used in a day in a city by the high temperature for that day. What would be the predicted water usage for a temperature of 1000? Evaluate the regression model by calculating se, by calculating r2, and by testing the slope. Let α = .01.