Find the necessary confidence interval for a population mean u for the following values. (Round your answers to three decimal places.) a 90% confidence interval, n = 60, x = 27.3, s2 = 3.59 Interpret the interval that you have constructed. O There is a 90% probability that the population mean is within the interval. There is a 90% probability that the sample mean is within the interval. O We are 90% confident that the sample mean is within the interval. O We know that 90% of the population is within the interval. O We are 90% confident that the population mean is within the interval. You may need to use the appropriate appendix table or technology to answer this