Simple regression was employed to establish the effects of childhood exposure to lead. The effective sample...
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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 tstatistic 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 Estimated SLope Std. Error tcalculated p-value Differ from 8? Highest grade achieved .061 -0.027 8. e09 .ee8 Yes Reading grade equivalent .121 -0.070 0.018 .Bee Yes Class standing .039 -0.006 8.003 .848 No Absence from school .071 4.8 1.7 .006 Yes Grammatical reasoning .051 0.159 8.062 .012 No Vocabulary .108 -0.124 0.032 .Bee Yes Hand-eye coordination .843 8.841 0.018 .020 No Reaction time .e25 11.8 6.66 .88e No Minor antisocial behavior .025 -0.639 8.36 882 No (b) It would be inappropriate to assume cause and effect without a better understanding of how the study was conducted. No Yes 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 tstatistic 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 Estimated SLope Std. Error tcalculated p-value Differ from 8? Highest grade achieved .061 -0.027 8. e09 .ee8 Yes Reading grade equivalent .121 -0.070 0.018 .Bee Yes Class standing .039 -0.006 8.003 .848 No Absence from school .071 4.8 1.7 .006 Yes Grammatical reasoning .051 0.159 8.062 .012 No Vocabulary .108 -0.124 0.032 .Bee Yes Hand-eye coordination .843 8.841 0.018 .020 No Reaction time .e25 11.8 6.66 .88e No Minor antisocial behavior .025 -0.639 8.36 882 No (b) It would be inappropriate to assume cause and effect without a better understanding of how the study was conducted. No Yes
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Related Book For
Applied Statistics in Business and Economics
ISBN: 978-0073521480
4th edition
Authors: David Doane, Lori Seward
Posted Date:
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