Problem 3 (25 Points) A researcher is interested in determining the factors that

Question

Problem 3 (25 Points) A researcher is interested in determining the factors that affect patient arsenic the arsenic levels in their toe nail clippings. levels by testing 0.00021 0.118 3 5 0.00115 .118 37 0.277 13 0358 0.08 0.158 0.00039.105 0073 0.0460832 00194 0.137 0.0214 00175 8 32 0851 632 42 62 0433 0.141 0.275 0.135 0.175 0.00012 0.0041 Regression Analysis: ARS NAILS versus AGE, SE,. The regression equation is ARS NAILS-0.151.0.0012 9.AGE + 0.146 St-0.0117 DRINK OSE-0.0256 coor esg +13.2 ARS KATER Predictor Constant AGE Coef SE Coef TP 0.15130.4837 0.31 0.759 -0.001291 0.003439 -0.38 0.713 0.14640.1073 1.36 0.193 DRINK USE -0.011660.04695 -0.25 0.807 COOK USE 0.02565 0.08273 -0.31 0.761 ARS WATER 13.1861.636 8.06 0.000 s 0.229904 R-Sq-83.3 R-Sqladj)77-7 Use the model to predict the arsenic level in nails using the information from the arrow indicated row a) b) Using the information from part (a) calculate the residual. 6IPage

Explanation / Answer

Equation:

a) ARS = 0.1513 + 62 * (- 0.001291) + 0.1464 * 1 + 5 * (- 0.01166) + 5 * (- 0.2565) + 13.186 * 0.00012

ARS = -1.12

b) Residual = observed - predicted

R = 0.135 - (- 1.12)

R= 1.255

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