ENDIX D O Table- 5 points) Interval Estimation and Hypothesis Testing: Researchers are interested in ating the true average banking (in degrees) of all U.S. speedways. They selected a es. le random sample of 22 U.S. speedways and recorded the degrees of banking on the 18.5 35 18 11 |23 .5 32 25 18.5 8 6 9 21 24 13 17.5 14 22 9 32 14.5 17 25 22 11 7.5 points) Calculate and interpret a 99% confidence interval for the true mean banking of all U.S. speedways. List all the assumptions that you must make. (7.5 points) The average degree of banking on the speedways worldwide is 13. Test at significance level 0.01 if the true mean banking of U.S. speedways is different from the worldwide average. List all the assumptions that you must make