Consider the following time series data of sales per year: year sales 1995 22.2 1996 23.0 1997 24.4 1998 25.8 1999 27.6 enter these data in excel and run the following regression: sales = intercept + slope * year note that the year is the independent variable and sales is the dependent variable. develop a two tail test for the theory that the slope of the regression line is different from zero.

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