The combined cityinighway fuel economy of a 2023 Lenus UX 250 Hybrid is a normally distributed random variable weis a mean of
\mu =26.25mpg
and a standard deviation of
\sigma =3.00mpg
. (a) What is the standard error of
\bar{x}
, the mean from a random sample of 9 flups by one driver? Note: Round your answer to
4
decimal places.
?
Standard error of
x
(b) Within what interval would you expect the sample mean to fall, with 95 percent probability? Note: Round your answers to 4 decimal places.
?
The interval is from 0

Question

The combined cityinighway fuel economy of a 2023 Lenus UX 250 Hybrid is a normally distributed random variable weis a mean of

\mu =26.25mpg

and a standard deviation of

\sigma =3.00mpg

. (a) What is the standard error of

\bar{x}

, the mean from a random sample of 9 flups by one driver? Note: Round your answer to

4

decimal places.

?

Standard error of

x

(b) Within what interval would you expect the sample mean to fall, with 95 percent probability? Note: Round your answers to 4 decimal places.

?

The interval is from 0

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