Answer Happy

An ethanol railroad tariff is a fee charged for shipments of
ethanol on public railroads. An agricultural association publishes
tariff rates for​ railroad-car shipments of ethanol. Assuming
that the standard deviation of such tariff rates is
​$900​,
determine the probability that the mean tariff rate of
400
randomly selected​ railroad-car shipments of ethanol will
be within
​$110
of the mean tariff rate of all​ railroad-car shipments of
ethanol. Interpret your answer in terms of sampling error.
Question content area bottom
Part 1
The probability is
enter your response here.
​(Round to three decimal places as​ needed.)
Part 2
Interpret this probability in terms of the sampling error.
Choose the correct answer below and fill in the answer box to
complete your choice.
There is about a
enter your response here​%
chance that the sampling error made in estimating the
▼
mean
variance of the
tariff rate of all​ railroad-car shipments of ethanol will
be
▼
exactly
at least
at most
​$110.
​(Round to one decimal place as​ needed.)