Curcumin is insoluble in water in acidic solutions.
Questions
Curcumin is insоluble in wаter in аcidic sоlutiоns.
Plаstic micrоpаrticles аre cоntaminating the wоrld’s shorelines, and much of this pollution appears to come from fibers from washing polyester clothes.1 The worst offender appears to be fleece, and a recent study found that the mean number of polyester fibers discharged into wastewater from washing fleece was 290 fibers per liter of wastewater, with a standard deviation of 87.6 and a sample size of 120. 1Browne, M., et. al., ‘‘Accumulation of Microplastic on Shorelines Worldwide: Sources and Sinks,” Environmental Science and Technology, 2011; 45: 9175-9179. Data are approximated from information given.(a) Find a 95% confidence interval for the mean number of polyester microfibers per liter of wastewater when washing fleece. Round your answers to one decimal place. ___________ to ____________(b( What is the margin of error? Round your answer to one decimal place. ____________(c) If we want a margin of error of only ±7 with 95% confidence, what sample size is needed?Round your answer up to the nearest integer. sample size = _________