lan is a phycologist interested in determining the proportion of algae samples from a local rivulet that belonged to a particular phylum. A random sample of 50 alga were obtained and each was categorized as either being cyanobacteria or not. It was found that 38 were, in fact, cyanobacteria. a. What is the sample proportion that were cyanobacteria? b. What is the Z" value? Have your answer in 3 decimals. c. lan wanted to estimate the proportion that were cyanobacteria with 99% confidence interval. Have the variability in 4 decimals. What is the MOE? Have your answer in 4 decimals.