An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California. Suppose that the mean income is found to be $21.1 for a random sample of 717 people. Assume the population standard deviation is known to be $12.6.

Construct the 99% confidence interval for the mean per capita income in thousands of dollars. Round your answers to one decimal place.

Group of answer choices

20.4 to 21.8

19.9 to 22.1

19.5 to 22.8

19.2 to 20.1