Unit 3 Chapter 9: Lesson 9.5 Assignment Score: 0.1er 018 answered .QuestionS v From previous studies, it is concluded that 90% of people mind if others smoke near a building entrance. A researcher claims that the proportion is significantly different than 90% and decides to survey 400 working adults. Test the researchers claim at the a = 0.05 significance level. Preliminary: a. Is it safe to assume that n 5 0.05 of all subjects in the population? Yes No b. Verify np(1 p) 2 10. Round your answer to one decimal place. a.-.) = :1 Test the claim: a. The null and alternative hypotheses are Ho:p=0.9 Ho:p$0.9 Haipa Ha:p>0.9 Ho:u$0.9 H0:u=0.9 Haip>0.9 Ha:p#0.9 Ho:p20.9 H0:p20.9 Ha2p