Are there more children diagnosed with Autism Spectrum Disorder (ASD) in states that have larger urban areas over states that are mostly rural? In the state of Pennsylvania, a fairly urban state, there are 245 eight year olds diagnosed with ASD out of 18,440 eight year olds evaluated. In the state of Utah, a fairly rural state, there are 45 eight year olds diagnosed with ASD out of 2,123 eight year olds evaluated ("Autism and developmental," 2008). Estimate the difference in proportion of children diagnosed with ASD between Pennsylvania and Utah. Use a 98% confidence level.

Determine PPennsylvania and PUtah

enter both in decimal form to the nearest ten-thousandth

determine Z score corresponding to desired confidence level

enter both in decimal form to the nearest ten-thousandth

determine error bound of the proportion

enter both in decimal form to the nearest ten-thousandth

determine the confidence interval

enter lower bound value to the nearest tenthousand, followed by <, folowed by "p1-p2" for proportion difference

using the confidence interval select the correct description of the result of the survey

calculate the following number of arrangements

20C4