the highway fuel economy of a 2016 Lexus RX 350 FWD 6 cylinder 3.5 L automatic 5 speed using premium fuel is a normally distributed random variable wiht a mean of U =19.50 mpg and a standard deviation of O =1.50 mpg

a) what is the satandard error of X the mean from a random sample of 9 fill ups by one driver?

(round your answer to 4 decimals)

standard error of X the X has a line over it.

B) within what interval would you expect the sample mean to fall with 95 percenct probability?

round answer to 4 decimals

the interval is from ______________ to _____________________