Question: You are to set up the chart, write the formulas, organize your work, and show your work to get credit for this project. By the way, it would help to know which problems to do. Please do problem #4 a,b,c, in the chapter review. Make sure you do the problem the same way that I gave you in the notes.

Predicting cost of electricity

kWH: 3375 2661 2073 2579 2858 2296 2812 2433 2266 3128 __________________________________________________________________

Heating Degree days: 2421 1841 438 15 152 1028 1967 1627 537 26 ___________________________________________________________________________

Average Daily Temp: 26 34 58 72 67 48 33 39 66 71 ____________________________________________________________________________

Cost (dollars) 321.94 221.11 205.16 251.07 279.8 183.84 244.93 218.59 213.09 333.49

a.) Use 0.05 significance level to test for a linear correlation between the average daily temperature and the cost.

b.) What percentage of the variation in cost can be explained by the linear relationship between cost and the average daily temperature?

c.) Find the equation of the regression line that expresses cost (y) in terms of the average daily temperature.