Question: 4. a. Use a 0.05 significance level to test for a linear correlation between the average daily temperature and the cost. b. What percentage of

4.

a. Use a 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 average daily temperature?

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

d. What is the best predicted cost at a time when the average daily temperature is 40?

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