In: Statistics and Probability
An accountant for a small manufacturing plant collected the following random sample to study the relationship between x = the cost to make a particular item and y = the selling price.
x (cost) 26 50 47 23 52 71
y (selling price) 78 132 128 70 152 198
(a) Calculate the least squares line in the form ˆy “ a ` bx.
(b) Calculate the coefficient of determination.
(c) Estimate the selling price of an item if the cost to manufacture the item is $75. (Round to the nearest penny)