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Problem #4 (Kozak Problem 7.2.6) In 2008, there were 507 children in Arizona out of 32,601 who were diagnosed with Autism Spectrum Disorder (ASD) (Autism
Problem #4 (Kozak Problem 7.2.6) In 2008, there were 507 children in Arizona out of 32,601 who were diagnosed with Autism Spectrum Disorder (ASD) ("Autism and developmental," 2008). Nationally 1 in 88 children are diagnosed with ASD ("CDC features -," 2013). Is there sufficient data to show that the incident of ASD is more in Arizona than nationally? Test at the 1% level. i. Which of the following statements correctly defines the null hypothesis Ho ? A. p = 0.011 C. H > 507 B. = 507 D. p > 0.011 ii. Which of the following statements correctly defines the alternate hypothesis HA ? A. p = 0.011 C. H > 507 B. M = 507 D. p > 0.011 iii. What is the level of significance a used for this test (expressed as decimal) ? iv. Determine p (to nearest 0.0001) V . Do values for np and nq (where q = 1 - p) both exceed 5? vi. Calculate test statistic (to nearest 0.001) vii. Using MS Excel, calculator, or LEO classroom Content > Course Resources > Free Web Applets & Statistical Resources: Determine p-value (to nearest 0.001) corresponding to test statistic. viii. Comparing p-value and a value, which is the correct decision to make for this hypothesis test? A. Reject Ho C. Accept Ho B. Fail to reject Ho D. Accept HA ix. Select the statement that most correctly interprets the result of this test: . The result is statistically significant at .01 level of significance. Evidence supports the claim that the proportion of Arizona children in 2008 with ASD is more than the national proportion. B. The result is statistically significant at .01 level of significance. There is not enough evidence to show that the proportion of Arizona children in 2008 with ASD is more than the national proportion. C. The result is not statistically significant at .01 level of significance. There is not enough evidence to show that the proportion of Arizona children in 2008 with ASD is more than the national proportion. D. The result is not statistically significant at .05 level of significance. Evidence supports the claim that the proportion of Arizona children in 2008 with ASD is more than the national proportion
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