Question 4 (of 5) value: 0.00 points Simple regression was employed to establish

Question

Question 4 (of 5) value: 0.00 points Simple regression was employed to establish the effects of childhood exposure to lead. The effective sample size was about 122 subjects. The independent variable was the level of dentin lead (parts per million). Below are regressions using various dependent variables. (a) Calculate the t statistic for each slope. From the p-values, which slopes differ from zero at a01 Round your answers to 2 decimal places. Negative values should be indicated by a minus sign.) Estimated nt Variable Slope 0.032 0.167 o.097 0.057 -0.007 0.002 0.023 0.024 0.070 2.600 .780 0.071 0.041 0.035 5.820 0.750 0.000 (Click to select) 0.000 (Click to select) 0.771 (Click to select) 0.147 0.007 Click to select) 0.006 (Click to select) 0.182 CClicktoselect) 0.057 (Click to select) 0.095 Reading grade equivalent Class standing Absence from school Grammatical reasoning Vocabulary Hand-eye coordination (Click to select) 0.061 0.196 0.112 0.114 0.047 0.017 11.200 0.019 0.507 0.061 Reaction time 0.500 (Click to select) (b) lt would be inappropriate to assume cause and effect without a better understanding of how the study No

Explanation / Answer

as test statistic =estimated slope/std error

tcalculated differ from 0 highest grade achieved -16.00 Yes reading grade eq -4.22 Yes class standing -0.29 No absence from school 1.46 No grammatical reasoning 2.76 Yes vocab -2.78 Yes hand eye co-ordination 1.34 No reaction time 1.92 No minor aristorical -0.68 No

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