A local tire dealer wants to predict the number of tires sold each month.He believes that the number of tires sold is a linear function of the amount of money invested in advertising.He randomly selects 6 months of data consisting of tire sales (in thousands of tires)and advertising expenditures (in thousands of dollars).Based on the data set with 6 observations,the simple linear regression equation of the least squares line is ŷ = 3 + 1x. 
Using the sums of the squares given above,determine the 95 percent confidence interval for the slope.
Definitions:
Points of Difference
Characteristics that set a product or service apart from its competitors, highlighting unique features or benefits.
Points of Difference
Unique features or benefits of a product or service that set it apart from competitors in the eyes of consumers.
Brand Authenticity
The extent to which a brand is perceived as genuine, reliable, and true to its values, ethics, and promises to its consumers.
Poseur Brand
is a brand that attempts to project a certain image or status without genuine substance or authenticity to back it up.
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