Answer Happy

PLEASE EXPLAIN HOW I WOULD DO THIS ON A TI-84CALCULATOR. THANK YOU!
(3 points) An online used car company sells second-hand cars. For 30 randomly selected transactions, the mean price is 2000 dollars. Part a) Assuming a population standard deviation transaction prices of 270 dollars, obtain a 99% confidence interval for the mean price of all transactions. Please carry at least three decimal places in intermediate steps. Give your final answer to the nearest two decimal places. Confidence interval: ( ). Part b) Which of the following is the correct interpretation for your answer in part (a)? A. There is a 99% chance that the mean price of all transactions lies in the interval B. If we repeat the study many times, 99% of the calculated confidence intervals will contain the mean price of all transactions. C. We can be 99% confident that the mean price for this sample of 30 transactions lies in the interval D. None of the above Note: You can earn partial credit on this problem. You have attempted this problem 9 times. Your overall recorded score is 0%. You have unlimited attempts remaining.