Reference no: EM132844856

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

Dependent VariableR2Estimated SlopeStd. Errortcalculatedp-valueDiffer from 0?Highest grade achieved .061 -0.027 0.009 .008
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Yes

No

Reading grade equivalent .121 -0.070 0.018 .000
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Yes

No

Class standing .039 -0.006 0.003 .048
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Yes

No

Absence from school .071 4.8 1.7 .006
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No

Yes

Grammatical reasoning .051 0.159 0.062 .012
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Yes

No

Vocabulary .108 -0.124 0.032 .000
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No

Yes

Hand-eye coordination .043 0.041 0.018 .020
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Yes

No

Reaction time .025 11.8 6.66 .080
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No

Yes

Minor antisocial behavior .025 -0.639 0.36 .082
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Yes

No

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