Answer....

b. The test is Select an answer v c. Based on the sample of 800 people, in; phone numbers in a certain city are unlisted. What is the test statistic? Round your answer to two decimal places. -: d. What is the p-yalue? Round your answer to four decimal places. :1 e. Make a decision. 0 Reject the null hypothesis. 0 Do not reject the null hypothesis. f. Make a conclusion. 0 There is not sufficient evidence that the proportion of people who phone numbers in a certain city are unlisted is significantly different than 28% at the a = [1.1 significance level. 0 There is sufficient evidence that the proportion of people who phone numbers in a certain city are unlisted is significantly different than 20% at the a = 0.1 significance level. From previous studies, it is concluded that 20% of phone numbers in a certain city are unlisted. A researcher claims that the proportion is significantly different than 20% and decides to survey 800 working adults. Test the researcher's claim at the a = 0.1 significance level. Preliminary: a. Is it safe to assume that n 0.2 O Ho: ul > 0.2 O Ho:p 2 0.2 Ha:u 0.2 Ha: u + 0.2