A researcher would like to determine if the proportion of households without health insurance coverage differs with household income. Suppose the following data were collected from 700 randomly selected households. Complete parts a through c. Household Income Less than $25,000 $25,000 to $49,999 $50,000 to $74,999 $75,000 or more a. Using = 0.01, perform a chi-square test to determine if the proportion of households without health insurance differs by income bracket. Choose the correct null and alternative hypotheses below. A. Ho: Not all p's are equal H1 P1 P2 P3 P4 C. Ho P1 P2 P3 P4 H: P1 P2 P3 P4 What is the test statistic? x = 9.56 (Round to two decimal places as needed.) What is the critical value? X0.01 = 11.34 (Round to two decimal places as needed.) State the conclusion. Ho. There is evidence that the proportion of households without health insurance differs by income bracket. OB. Ho: P1 P2 P3 P4 H1 P1 P2 P3 P4 D. Ho P1 P2 P3 P4 H: Not all p's are equal Heath Insurance Yes 59 140 205 28 No 20 41 38 171 26