ba 2. In a recent survey, 31% of 500 Americans under 65 said they would be willing to implant a device into their brain to connect to the internet. What is the margin of error with a 97% confidence? Show your work. ME=_ 3. A certain politician wants to know the percentage of voters support her stance on a particular issue. What size voter sample should be selected to determine with 91% confidence the support level within 3%? Show your work. n= 4. A researcher wants to investigate the proportion of people who be willing to implant a device into their brain to connect to the internet. What sample size should be used to estimate the true proportion with 4% and with 92% confidence? n=_