Question

Testa claim that the mean amount of carbon monoxide in the ar in U.S.es is less than 232 parts per million. It was found that the mean amount of carbon monoxide in the air for the random sample of 64 cities is 2.38 ans per million and the standard deviation to 2.11 para permition. Aaro.01.con the cambe sucoomed? Completo para a rough e bew. Assume that is needed (a) terly clamand, and H. Which of the following comedy Hd, Ho 22.32 H 22332 (Type Integer or decals. Do not mound The aim is the hypothesis Use technology to find the value and endly to rejection regions The critiche, Je comment news and Rund to del peces as needed Choose the graph which shows the motion region ОА a A

Answer 1

Given : n = 64 x = 2.38 S = 2.11 (9) Ho : i > 2.32 Hi 4 L 2.32 The claim in the alternative hypothesis (b) At X = 0.01 df-n-1: 64-1: 63 the critical value is, to: to df = to.OL, 63. 2.39 (from t-table) tato ta 0 Test statistic H -es Sin t 2.38 - 2.32 2011/164 + 0.06 0.26 t 0.23 since t> t critical, We fail to reject Ho There is not sufficient evidence to conclude that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.32 parts per million