An experiment reported in Popular Science compared fuel economies for two types of similarly equipped diesel mini-trucks. Let us suppose that 12 Volkswagen and 10 Toyota trucks were tested in 90- kilometer-per-hour steady-paced trials. If the 12 Volkswagen trucks averaged 16 kilometers per liter with a standard deviation of 1.0 kilometer per liter and the 10 Toyota trucks averaged 11 kilometers per liter with a standard deviation of 0.8 kilometer per liter, construct a 90% confidence interval for the difference between the average kilometers per liter for these two mini-trucks. Assume that the distances per liter for the truck models are approximately normally distributed with equal variances.
An experiment reported in Popular Science compared fuel economies for two types of similarly equipped diesel mini-trucks. Let us suppose that 12 Volkswagen and 10 Toyota trucks were tested in 90- kilometer-per-hour steady-paced trials. If the 12 Volkswagen trucks averaged 16 kilometers per liter with a standard deviation of 1.0 kilometer per liter and the 10 Toyota trucks averaged 11 kilometers per liter with a standard deviation of 0.8 kilometer per liter, construct a 90% confidence interval for the difference between the average kilometers per liter for these two mini-trucks. Assume that the distances per liter for the truck models are approximately normally distributed with equal variances.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Transcribed Image Text:An experiment reported in Popular Science compared fuel
economies for two types of similarly equipped diesel mini-trucks.
Let us suppose that 12 Volkswagen and 10 Toyota trucks were
tested in 90- kilometer-per-hour steady-paced trials. If the 12
Volkswagen trucks averaged 16 kilometers per liter with a
standard deviation of 1.0 kilometer per liter and the 10 Toyota
trucks averaged 11 kilometers per liter with a standard deviation
of 0.8 kilometer per liter, construct a 90% confidence interval for
the difference between the average kilometers per liter for these
two mini-trucks. Assume that the distances per liter for the truck
models are approximately normally distributed with equal
variances.
4.324 < Hvolkswagen
HToyota < 5.676
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