Students on an internship program in the US Fish and Wildlife Service wishes to test the nitrogen content on rivers and waterways in he US Midwest states. 36 sample measurements were taken in various rivers and waterways and the average nitrogen content is ound to be in 2.6 grams per milliliter. Find the 95% and 99% confidence intervals for the mean mercury content. Population standard deviation is 0.3 gram per milliliter. f the students want the error to be less than 0.05, how large a sample size would be required at 95% confidence? Would the required sample size increase if a higher degree of confidence is set? O a. 95% CI: 2.47 <µ<2.73; 99% CI: 2.50 < u < 2.70. Sample size should be 139. Smaller sample size required if the students set the % confidence higher

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