Thirty (30 ) students were asked if they voted for Hilary Clinton or John Nosh for president. Eighteen (18) said that they voted for Hilary and twelve (12) said they voted for John Nosh.
a) Using the proportions obtained for Clinton and Nosh, determine the sample size required to be 99% confident that the error is within 2 percentage points.
Sample size n = _______
b) If we have no information about the proportion of votes that either candidate received, determine the sample size necessary to be 95% confident that the error will be within 4 percentage points.
Sample size n = _______