An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. Suppose that the mean income is found to be $23.4 for a random sample of 211 people. Assume the population standard deviation is known to be $5.7. Construct the 80 % confidence interval for the mean per capita income in thousands of dollars. Round your answers to one decimal place. Keypad Tables Points AnswerHow to Enser) 2 Lower endpoint□ーーコ Upper endpoint