probability and statistics!

1. A phycologist is interested in determining the proportion of algae samples from a local rivulet that belong to a particular phylum, A simple random sample of 50 50 alga is obtained and each alga is categorized as either being a cyanobacterium or not. The researcher found that 33 alga were, in fact, cyanobacteria. (enter your answer in 3 decimal places) (a) What is the sample proportion of the algoe that were cyanobacteria? (b) What is the standard error of sample proportion of the algne that were cyanobacteria? (c) What is the 95% marginal error of the proportion of the algar that were cyanobacteria? 56 067 131 (d) What is 95% CI? watts Enter a fumber