Simple regression was employed to establish the effects of childhood exposure to

Question

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.

    

Calculate the t statistic for each slope. From the p-values, which slopes differ from zero at = .01? (Round your answers to 2 decimal places. Negative values should be indicated by a minus sign.)

  

please fill in the t-calc. thanks.

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.

Explanation / Answer

as we know that tcalculated =Estimated Slope/std error

and differ from 0 : Yes if p value is less then 0.01 otherwise no.

Dependent Variable R2 Estimated Slope Std Error tcalculated p-value Differ from 0?   Highest grade achieved 0.01 -0.028 0.02 -1.40 0.164 No   Reading grade equivalent 0.103 -0.098 0.038 -2.58 0.011 No   Class standing 0.012 -0.003 0.03 -0.10 0.921 No   Absence from school 0.064 5.4 1.57 3.44 0.001 Yes   Grammatical reasoning 0.039 0.172 0.078 2.21 0.029 No   Vocabulary 0.124 -0.188 0.052 -3.62 0.000 Yes   Hand-eye coordination 0.025 0.046 0.026 1.77 0.079 No   Reaction time 0.019 11.1 7.15 1.55 0.123 No   Minor antisocial behavior 0.033 -0.304 0.52 -0.58 0.560 No

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