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2021-3 Week 12: Chapter 9 - 2 Known Standard Deviation Progress saved Done Score: 20.65/25 3/5 answered Home Question 5 5 pts 9 1 98 0 Details Announcements Syllabus The mean age when smokers first start is 13 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS-electronic Modules nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 33 smokers found that their mean starting age was 12.2 years old. Do the data Grades support the claim at the 5% significance level? What are the correct hypotheses? People Office 365 Ho: Select an answer v ? v years My Media H1: Select an answer v ? v years Media Gallery Based on the hypotheses, find the following: Secure Exam Test Statistic z = (Give answer to at least 4 decimal places) Proctor (Proctorio) Library Critical Values = (Give answer to at least 4 decimal places) Make Tuition Based on the above we choose to |Select an answer Payment The correct summary would be: Select an answer that the claim that the Accredible mean age smokers first start is different than 13. Class Notebook Submit Question 2:50 PM Type here to search O 56F Partly sunny ~ 11/20/2021