Question

Health Canada wishes to estimate the mean amount of mercury μ, in parts per million (ppm), in commerical fish. Specifically, they want to estimate the value of μ to within 0.02, and be 97% confident in their results. Assume that the amount of mercury in commerical fish varies from one fish to another, the standard deviation being σ=0.4 ppm. How many commerical fish should be randomly chosen, each chosen will have the mercury content measured, to satisfy Health Canadas estimation of μ? (When values from a distribution, use three decimals.)

Answer 1