Sales over the past 10 years are shown below. Using the method of least squares, calculate...

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Sales over the past 10 years are shown below. Using the method of least squares, calculate the values of a and b to complete this regression equation. Year Sales 1 1,670 1,980 3 1,510 4 1,660 5 1,700 1,320 1,000 1,930 9 1,670 10 1,010 2 1678 (Indicate a negative answer using a *-*sign. Do not round intermediate calculations and round your answer to 3 decimal places.) Sales= What is your forecast for next year's sales? (Do not round intermediate calculations and round your answer to 2 decimal places.) Sales= Sales over the past 10 years are shown below. Using the method of least squares, calculate the values of a and b to complete this regression equation. Year Sales 1 1,670 1,980 3 1,510 4 1,660 5 1,700 1,320 1,000 1,930 9 1,670 10 1,010 2 1678 (Indicate a negative answer using a *-*sign. Do not round intermediate calculations and round your answer to 3 decimal places.) Sales= What is your forecast for next year's sales? (Do not round intermediate calculations and round your answer to 2 decimal places.) Sales=

Answer rating: 100% (QA)

X Y xxbar yybar xxbar2 xxbaryybar 1 1670 45 125 2025 5625 2 1980 35 435 1225 15225 3 1... View the full answer