ww A researcher wishes to estimate with 90%.confidence the population proportion of us who the Congress is doing good or excelent job. Hurremote contenu proti (a) No preliminary estimativa Find the minimum sample seeded (b) Find the minimum sample size needed, uning a prior shady that found that 20% of the spondents said they think Congress is doing a good or stort job (a) Compare the results from parts and that (a) What is the minimum sample size readed assuming that no prior information is available? Round up to the nearest whole number as needed)