Question 16 If n=350 and X = 280, to construct a 90% confidence interval, you need to use which one of the following calculator O One-Way ANOVA O Two Independent Sample Means Comparison Given Data Confidence Interval for a Population Mean Given Data O Chi-Square Test for Independence O Chi-Square Test for Goodness of Fit O'Two Dependent Sample Means Comparison Given Data Confidence Interval for a Population Mean Given Statistics O Two Independent Sample Means Comparison Given Statistics O Hypothesis Test for a Population Mean Given Statistics O Hypothesis Test for a Population Mean Given Data O Two Independent Proportions Comparison O Hypothesis Test for a Population Proportion Confidence Interval for a Population Proportion a. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. Confidence interval = b. Express the same answer as a tri-linear inequality using decimals (not percents) accurate to three decimal places.