1. The following sample observations were randomly selected :

x:	1	19	11	16	17	11	8	2
y:	20	12	1	7	6	12	11	13

a. Not available in connect.

b. Determine the regression equation. ( Negative answers should be indicated by minus sign. Do not round intermediate calculations and round the final answers to 4 decimal places.)

b= ------ a= -------

y'= ------- + -------- x

c. Determine the value of y' when x is 3 ( Use the part b rounded answers to calculate the answers. Round the final answers to 4 decimal places.)

2. The Sally Coffee Shop is considering closing one hour earlier in the evening through the week. Sally obtained the following data from a study taken last week of the number of customers between the hours of 10 and 11p.m., and the dollar value spent.( Round the final answers to 3 decimal places)

x:	17	17	12	9	10
y:	10	9	19	20	14

a. Determine the Standard error of estimate.

b. Suppose a large sample is selected ( instead of just five). About 68% of the predictions would be between what two values? Assuming that the Standard Error of Estimate does not change.

y' ------