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. (vii) Using tables, calculator, or spreadsheet: Determine and enter p-value corresponding to test statistic. Enter value in decimal form rounded to nearest thousandth. Examples of correctly entered answers: 0.000 0.001 0.030 0.600 0.814 1.000
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.
(vii) Using tables, calculator, or spreadsheet: Determine and enter p-value corresponding to test statistic.
Enter value in decimal form rounded to nearest thousandth. Examples of correctly entered answers:
0.000 0.001 0.030 0.600 0.814 1.000
(viii) Comparing p-value and α value, which is the correct decision to make for this hypothesis test?
A. Reject Ho
B. Fail to reject Ho
C. Accept Ho
D. Accept HA
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(ix) Select the statement that most correctly interprets the result of this test:
A. 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 not 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 .01 level of significance. Evidence supports the claim that the proportion of Arizona children in 2008 with ASD is not more than the national proportion.
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