A supermarket wants to test the effect of the height of the shelf display on the monthly sales of its dairy products, Y. There are three shelf heights: bottom, X1, middle, X2, and top, X3. The estimated model is given by: 728.3-4.7 X1 + 3.5 X2 2.1 X3 The p-value for the F-test on the joint significance of shelf height is equal to 0.161, and you.... A reject the null hypothesis, height helps explaining dairy sales B cannot reject H0, height does not help explaining dairy sales cannot reject H0, height helps explaining dairy sales reject the null hypothesis, height does not help explaining dairy sales

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