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 alga is obtained and each alga is categorized as either being a cyanobacterium or not. The researcher found that 40 alga were, in fact, cyanobacteria. (enter your answer in 3 decimal places) (a) What is the sample proportion of the algae that were cyanobacteria? (b) What is the standard deviation of the sample proportion of the algae that were cyanobacteria?(c) What is the 95% marginal error of the proportion of the algae that were cyanobacteria?(d) What is 95% CI?     ,      watts

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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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 alga is obtained and each alga is categorized as either being a cyanobacterium or not. The researcher found that 40 alga were, in fact, cyanobacteria. (enter your answer in 3 decimal places)

(a) What is the sample proportion of the algae that were cyanobacteria?
 
(b) What is the standard deviation of the sample proportion of the algae that were cyanobacteria?

(c) What is the 95% marginal error of the proportion of the algae that were cyanobacteria?

(d) What is 95% CI?
 
  ,  
 
 watts
 
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