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 with a mean of u = 25.00 mpg and a standard deviation of o = 1.75 mpg. (a) What is the standard error of X , the mean from a random sample of 16 fill-ups by one driver? (Round your answer to 4 decimal places.) Standard error of X (b) Within what interval would you expect the sample mean to fall, with 90 percent probability? (Round your answers to 4 decimal places.)

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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 with a mean of µ = 25.00 mpg and a standard deviation of o = 1.75 mpg.
(a) What is the standard error of X , the mean from a random sample of 16 fill-ups by one driver? (Round your answer to 4 decimal
places.)
Standard error of X
(b) Within what interval would you expect the sample mean to fall, with 90 percent probability? (Round your answers to 4 decimal
places.)
The interval is from
to
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Transcribed Image Text:Answered: Calculate the standarc X https://ezto.mheducation.com/ext/map/index.html?_con3Dcon&lexternal_browser3D0&launchUrl%3Dhttps%253A%252F%252Fnewconnect.mheduca... ork: Chapter 8 (Sections 8.1 through 8.5) i Saved Help Sav 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 with a mean of µ = 25.00 mpg and a standard deviation of o = 1.75 mpg. (a) What is the standard error of X , the mean from a random sample of 16 fill-ups by one driver? (Round your answer to 4 decimal places.) Standard error of X (b) Within what interval would you expect the sample mean to fall, with 90 percent probability? (Round your answers to 4 decimal places.) The interval is from to < Prev 3 of 10 Next >
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