Month No. of Advertisements Amt of sales 1 20 61000 2 24 77000 3 30 72000 4 23 66000 5 27 85000 6 25 77000 7 32 90000 8 35 10000 9 21 63000 10 34 97000 11 26 83000 12 29 70000   d) calculate the standard deviation of error e) test at the 5% significance level whether the slope of the regresson line is positive

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A: Determine whether the intercept coefficient (1664.46) is statistically significant at the 5 percent…

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