Question: Cameras come with many options, and it appears that the more that you want, the higher the cost of the camera. Consumer Reports2 has rated

Cameras come with many options, and it appears that the more that you want, the higher the cost of the camera. Consumer Reports2 has rated n = 20 cameras on qualities that we consumers are looking for. Variables that may relate to the cost of a camera are given in the following table where y = overall customer score, x1 = megapixels, x2 = weight (oz), x3 = optical zoom, x4 = widest angle, and x5 = battery life (shots).

c. Does advertising expenditure x2 contribute significant information for the prediction of y, given that x1 is already in the model? Use a = .01.
d. Calculate the coefficient of determination, R2. What percentage of the overall variation is explained by the model?

Camera Nikon Coolpix S8000 Canon PowerShot SD1400 IS Elph Sony Cyber-shot DSC-HX5V Sony Cyber-shot DSC-TX7 Panasonic Lumix DMC-FPI Canon PowerShot A3100 IS Sony Cyber-shot DSC-W380 Nikon Coolpix S70 Pentax Optio I-10 Olympus Stylus 5010 Olympus Stylus 7040 Sony Cyber-shot DSC-W350 Canon PowerShot A490 Canon PowerShot A945 Casio Exilim EX-G1 Samsung TL210 Olympus Stylus Tough-3000 Sony Cyber-shot DSC-W310 Olympus FE-47 Sony Cyber-shot DSC-S2100 Cost y X1 x2 x3 x4 X5 300 65 14 6 10.0 30 210 250 350 60 10 7 10.0 25 310 400 59 10 5 4.0 25 230 150 59 12 6 4.0 35 300 180 58 12 6 4.0 35 240 140 57 14 4 5.0 24 220 300 57 12 6 5.0 28 200 300 56 12 6 5.0 28 250 200 55 14 5 5.0 26 120 250 55 14 5 7.0 28 120 200 55 14 4 4.0 26 220 110 55 10 7 3.0 37 150 130 54 10 7 3.0 37 150 250 54 12 5 3.0 38 300 230 54 12 5 5.0 27 200 230 48 12 6 3.6 28 160 150 4712 5 4.0 28 220 120 47 14 7 5.0 36 120 120 46 12 7 3.0 35 170 61 14 5 4.0 28 230

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