1.)Construct a 95% confidence interval for the population mean given that x=25, n=51, and s=5. writte conclusion for this interval (what does it represent?).

2.)Suppose students are creating a confidence interval for the population mean using the same statistics from question 1. Erin is using a 90% confidence level and Robert is using a 99% confidence level. Who will make wider interval? Explain why without actually performing the calculations.