1. What is the correct critical value of t for a 90% confidence interval with a sample size of 14? 2.16 2.145 1.761 1.771 2. You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Your sample size is 8.Find the critical value that corresponds to a confidence level of 90%.(Report answer accurate to three decimal places with appropriate rounding.)ta/2 = ±___________   3. If n = 28, ¯xx¯ = 47, and s = 12, construct a confidence interval at a 90% confidence level. Assume the data came from a normally distributed population. Give your answers to three decimal places._________ <μ< __________

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