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The accompanying table shows results from a study in which some dental patients were treated with amalgam restorations and others were treated with composite restorations
The accompanying table shows results from a study in which some dental patients were treated with amalgam restorations and others were treated with composite restorations that do not contain mercury. Use a 0.01 significance level to test for independence between the type of restoration and the presence of any adverse health conditions. Do amalgam restorations appear to affect health conditions? - Determine the null and alternative hypotheses Dental Restorations (O A. Hy: The presence of any adverse health conditions is independent of the type of restoration H4: The presence of any adverse health conditions is not independent of the type of restoration Amalgam | Composite & Adverse Health Condition Reported 139 152 H4: Amalgam restorations do not affect health conditions No Adverse Health Condition P 5t Reported (O B. Hp: Amalgam restorations adversely affect health conditions. 0c. Hy: Amalgam restorations do not affect health conditions. H,: Amalgam restorations adversely affect health conditions. Hy: The presence of any adverse health conditions is not independent of the type of restoration. H,: The presence of any adverse health conditions is independent of the type of restoration. E Determine the test statistic x2 = : (Round to three decimal places as needed.) Determine the P-value of the test statistic. P-value = (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? Since the P-value is | the significance level, | the null hypothesis. There sufficient evidence to warrant rejection of the claim that the type of restoration and the presence of any adverse health conditions are independent. The results suggest that amalgam restorations | to affect health conditions
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