A tire manufacturer believes that the tread life of its snow tires can be described by a Normal model with a mean of 31 000 miles and a standard deviation of 2500 miles. Complete parts a through e below.Question content area bottomPart 1a) If you buy a set of these tires, would it be reasonable for you to hope that they'll last 36 000 miles? Explain.About 2.3% of tires are expected to have a tread life greater than 36 000 miles. It would not be reasonable to hope that your tires lasted this long.(Round to one decimal place as needed.)Part 2b) Approximately what fraction of these tires can be expected to last less than 27 000 miles?About 5.5% of these tires can be expected to last less than 27 000 miles.(Round to one decimal place as needed.)Part 3c) Approximately what fraction of these tires can be expected to last between 27 000 and 35 000 miles?About 89.0% of these tires can be expected to last between 27 000 and 35 000miles. (Round to one decimal place as needed.) Part 4 d) Estimate the interquartile range (IQR) for these data.
A tire manufacturer believes that the tread life of its snow tires can be described by a Normal model with a mean of 31 000 miles and a standard deviation of 2500 miles. Complete parts a through e below.
Question content area bottom
Part 1
a) If you buy a set of these tires, would it be reasonable for you to hope that they'll last 36 000 miles? Explain.
About
2.3% of tires are expected to have a tread life greater than 36 000 miles. It
would not
be reasonable to hope that your tires lasted this long.
(Round to one decimal place as needed.)
Part 2
b) Approximately what fraction of these tires can be expected to last less than 27 000 miles?
About
5.5% of these tires can be expected to last less than 27 000 miles.
(Round to one decimal place as needed.)
Part 3
c) Approximately what fraction of these tires can be expected to last between 27 000 and 35 000 miles?
About 89.0% of these tires can be expected to last between 27 000 and 35 000
miles.
Part 4
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