1) A researcher is interested in opinions toward the mayor, so she asked 450 respondents to rate his job performance on a scale from 1 (Extremely poor performance) to 7 (Extremely strong performance). Her sample mean is 6.1 and her standard deviation is 2.4. Based on the information she has obtained from her sample, she can be 95% confident that the true population mean falls within what range? (In other words, calculate the 95% confidence interval.) (5 points)