# A researcher wishes to estimate, with 99% confidence, the population proportion of adults who are confident with their

### A researcher wishes to estimate, with 99% confidence, the population proportion of adults who are confident with their country's banking system. His estimate must be accurate within 2% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 25% of the respondents said they are confident with their country's banking system.

Solution file includes:
Samplesize08071701.pdf