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 α = .01?(Round your answers to 2 decimal places. Negative values should be indicated by a minus sign.) Dependent Variable R2 Estimated Slope Std Error tcalculated p-value Differ from 0? Highest grade achieved 0.010 -0.028 0.020 Not attempted .164 No Correct Reading grade equivalent 0.103 -0.098 0.038 Not attempted .011 No Correct Class standing 0.012 -0.003 0.030 Not attempted .921 No Correct Absence from school 0.064 5.400 1.570 Not attempted .001 Yes Correct Grammatical reasoning 0.039 0.172 0.078 Not attempted .029 No Correct Vocabulary 0.124 -0.188 0.052 Not attempted .000 Yes Correct Hand-eye coordination 0.025 0.046 0.026 Not attempted .079 No Correct Reaction time 0.019 11.100 7.150 Not attempted .123 No Correct Minor antisocial behavior 0.033 -0.304 0.520 Not attempted .560 No Correct

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...

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 α = .01?(Round your answers to 2 decimal places. Negative values should be indicated by a minus sign.)

Dependent Variable	R²	Estimated Slope	Std Error	t_calculated	p-value	Differ from 0?
Highest grade achieved		0.010			-0.028		0.020	Not attempted	.164	No Correct
Reading grade equivalent		0.103			-0.098		0.038	Not attempted	.011	No Correct
Class standing		0.012			-0.003		0.030	Not attempted	.921	No Correct
Absence from school		0.064			5.400		1.570	Not attempted	.001	Yes Correct
Grammatical reasoning		0.039			0.172		0.078	Not attempted	.029	No Correct
Vocabulary		0.124			-0.188		0.052	Not attempted	.000	Yes Correct
Hand-eye coordination		0.025			0.046		0.026	Not attempted	.079	No Correct
Reaction time		0.019			11.100		7.150	Not attempted	.123	No Correct
Minor antisocial behavior		0.033			-0.304		0.520	Not attempted	.560	No Correct

Jun 08, 2022

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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...

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