Regression analysis was applied between sales data (y in $1000s) and advertising data (x in $100s) and the following information was obtained. a = 12 + 1.8x n=17 SSR-225 SSE = 75 Sb.2683 The r statistic for testing the significance of the slope is 1.80. 1.96. 6.71. .56.

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A:

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