This question is asking for A-C

6.3.17-T Assigned Media Question Help A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be its accurate within 5% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. u (b) Find the minimum sample size needed, using a prior study that found that 42% of the respondents said they think Congress is doing a good or excellent job. (c) Compare the results from parts (a) and (b). SS (a) What is the minimum sample size needed assuming that no prior information is available? n= (Round up to the nearest whole number as needed.) SS ra ons Enter your answer in the answer box and then click Check