In a study we see that plastic micro particles are contaminating the world's shorelines and that much of the pollution appears to come from fibers from washing polyester clothes. The same also took samples from ocean beaches. Five samples were taken from each 18 different shorelines worldwide, for a total of 90 samples of size 250mL. The mean number of plastic micro particles found per 250mL of sediment was 18.3 with a standard deviation of 8.2.

(c) If we want a margin of error of only + 1 with 90% confidence, what sample size is needed? The absolute tolerance is + 3. rest integer. sample size = eTextbook and Media Assistance Used e Textbook Save for Later Last saved 1 second ago. Attempts: 0 of 3 used Submit Answer Saved work will be auto-submitted on the due date. Auto- submission can take up to 10 minutes