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, at significance level = 0.01. (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.)   Dependent Variable R2 Estimated Slope Std. Error tcalculated p-value Differ from 0? Highest grade achieved   .061     −0.027     0.009       .008     (Click to select)   Yes   No  Reading grade equivalent   .121     −0.070     0.018       .000     (Click to select)   Yes   No  Class standing   .039     −0.006     0.003       .048     (Click to select)   No   Yes  Absence from school   .071     4.8     1.7       .006     (Click to select)   No   Yes  Grammatical reasoning   .051     0.159     0.062       .012     (Click to select)   No   Yes  Vocabulary   .108     −0.124     0.032       .000     (Click to select)   Yes   No  Hand-eye coordination   .043     0.041     0.018       .020     (Click to select)   No   Yes  Reaction time   .025     11.8     6.66       .080     (Click to select)   Yes   No  Minor antisocial behavior   .025     −0.639     0.36       .082     (Click to select)   No   Yes

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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, at significance level = 0.01. (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.)
  

Dependent Variable R2 Estimated Slope Std. Error tcalculated p-value Differ from 0?
Highest grade achieved   .061     −0.027     0.009       .008     (Click to select)   Yes   No 
Reading grade equivalent   .121     −0.070     0.018       .000     (Click to select)   Yes   No 
Class standing   .039     −0.006     0.003       .048     (Click to select)   No   Yes 
Absence from school   .071     4.8     1.7       .006     (Click to select)   No   Yes 
Grammatical reasoning   .051     0.159     0.062       .012     (Click to select)   No   Yes 
Vocabulary   .108     −0.124     0.032       .000     (Click to select)   Yes   No 
Hand-eye coordination   .043     0.041     0.018       .020     (Click to select)   No   Yes 
Reaction time   .025     11.8     6.66       .080     (Click to select)   Yes   No 
Minor antisocial behavior   .025     −0.639     0.36       .082     (Click to select)   No   Yes 
 
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