Simple regression was employed to establish the effects of childhood exposure to lead. The effective sample...

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Statistics

Simple regression was employed to establish the effects ofchildhood exposure to lead. The effective sample size was about 122subjects. The independent variable was the level of dentin lead(parts per million). Below are regressions using various dependentvariables.

(a) Calculate the t statistic for eachslope, at significance level = 0.01. (Negative valuesshould be indicated by a minus sign. Round your answers to 2decimal places.)
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Dependent Variable R² Estimated Slope Std. Error t_calculated p-value Differ from 0?
Highest grade achieved .061 âˆ’0.027 0.009 .008 (Click to select)Â Â YesÂ Â No
Reading grade equivalent .121 âˆ’0.070 0.018 .000 (Click to select)Â Â NoÂ Â Yes
Class standing .039 âˆ’0.006 0.003 .048 (Click to select)Â Â NoÂ Â Yes
Absence from school .071 4.8 1.7 .006 (Click to select)Â Â YesÂ Â No
Grammatical reasoning .051 0.159 0.062 .012 (Click to select)Â Â YesÂ Â No
Vocabulary .108 âˆ’0.124 0.032 .000 (Click to select)Â Â NoÂ Â Yes
Hand-eye coordination .043 0.041 0.018 .020 (Click to select)Â Â YesÂ Â No
Reaction time .025 11.8 6.66 .080 (Click to select)Â Â YesÂ Â No
Minor antisocial behavior .025 âˆ’0.639 0.36 .082 (Click to select)Â Â YesÂ Â No

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ConceptSolutionArranging the data in the proper formatDependent VariableRsquareEstimated slopeStd ErrortcalculatedHighest grade achieved006100270009Reading grade equivalent012100700018Class standing003900060003Absence from See Answer

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