Question

Question 6 of 10 (1 point) | Attempt 1 of Unlimited | View question in a popup 11.2 Section Exercise 14 (p-value, calc) Hurricane damage: In August and September 2005, Hurricanes Katrina and Rita caused extraordinary flooding in New Orleans, Louisiana. Many homes were severely damaged or destroyed, and of those that survived, many required extensive cleaning. It was thought that cleaning flood-damaged homes might present a health hazard due to the large amounts of mold present in many of the homes. In a sample of 350 residents of Orleans Parish who had participated in the cleaning of one or more homes, 80 had experienced symptoms of wheezing, and in a sample of 180 residents who had not participated in the cleaning, 40 reported wheezing symptoms (numbers read from a graph). Can you conclude that the proportion of residents with wheezing symptoms is greater among those who participated in the cleaning of flood-damaged homes? Let P, denote the proportion of residents with wheezing symptoms who had cleaned flood-damaged homes and p, denote the proportion of residents with wheezing symptoms who had not cleaned flood-damanged homes. Use the a = 0.10 level of significance and the P-value method with the TI-84 Plus calculator. ol. Part 1 of 4 State the null and alternate hypotheses. Ho: P1 = P2

Answer 1

Hypothesis can be formulated as: Ho: Pi = Per He: Pi> P₂ It is given that, 80 = 0.22 8571428 ñ 0.2286 350 Pi= دعم =40 -0.222222 0.2222 180 Test Steetistici z = Speinelth iß Pthitto) whore Ipa80+40 350 +180 120 530 -0.22 6415 0.2264 None, Z-0.2286 -0.2222 0.2264x0.7736 XL 350 + 18 = 0.0064 0.038385225 = 0.1667 P-value P[Z>.0.1667] = 1-PEZ 30.1667) =-0.566197 = 0.433803 ū0.4338