9:28 ok 20 7 VOLTE LTE Will ezto.mheducation.com/ext/r 10 . . . 8-3 Homework: ... Saved ave & Exit Submit Check my work 3 The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium fuel 5 is a normally distributed random points variable with a mean of M = 20.50 mpg and a standard deviation of 0 = 3.00 Skipped mpg. (a) What is the standard error of X , eBook the mean from a random sample of 36 Hint fill-ups by one driver? (Round your answer to 4 decimal places.) Ask Print Standard error of X References (b) Within what interval would you expect the sample mean to fall, with 99 percent probability? (Round your Mc Graw Hill X D2L + O9229 d?! 8 A , (a +