help on question 5 please

blackboard.cpp.edu + Take Test: Final Exam - STA 1200.23 ($20) Statistics ... A Population Has Standard Deviation 0 = 17.9. Part... | Chegg.c.. Homework Help - Q&A from Online Tutors - Course Hero A population has a standard deviation 21.1 How large a sam. Find the critical value a/2 needed to construct a confidence Interval of the given level with ure given sample Size. Level 98%, sample size 14 O 2.282 O 2.625 O 2.326 2.650 QUESTION 5 A population has a standard deviation o = 21.1. How large a sample must be drawn so that a 90% confidence interval for / will have a margin of error equal to 3.9? O2 O 80 09 O 188 QUESTION 6 Click Save and Submit to save and submit. Click Save All Answers to save all answers