Question

A man who moves to a new city sees that there are two routes he could take to work. A neighbor who has lived there a long time tells him Route A will average 5 minutes faster than Route B. The man decides to experiment. Each day he flips a coin to determine which way to go, driving each route 10 days. He finds that Route A takes an average of 42 minutes, with standard deviation 11 minutes and Route B takes an average of 47 minutes, with standard deviation 55 minutes .

Histograms of travel times for the routes are roughly symmetric and show no outliers. Complete parts a and b. Use

alphaαequals=0.05.

a) Find a 95% confidence interval for the difference between the Route B and Route A commuting times

How can the degree of freedom be found using the table?

Answer #1

A trucking company would like to compare two different routes
for efficiency. Truckers are randomly assigned to two different
routes. Twenty truckers following Route A report an average of 42
minutes, with a standard deviation of 4 minutes. Twenty truckers
following Route B report an average of 47 minutes with a standard
deviation of 3 minutes. Histograms of travel times for the routes
are roughly symmetric and show no outliers.
a) Find a 95% confidence interval for the difference in...

Two men, A and B, who usually commute to work together decide to
conduct an experiment to see whether one route is faster than the
other. The men feel that their driving habits are approximately the
same, so each morning for two weeks one driver is assigned to route
I and the other to route II. The times, recorded to the nearest
minute, are shown in the following table. Using this data, find the
90% confidence interval for the true...

Two men, A and B, who usually commute to work together
decide to conduct an experiment to see whether one route is faster
than the other. The men feel that their driving habits are
approximately the same, so each morning for two weeks one driver is
assigned to route I and the other to route II. The times, recorded
to the nearest minute, are shown in the following table. Using this
data, find the 98% confidence
interval for the true...

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

What tools could AA leaders have used to increase their
awareness of internal and external issues?
???ALASKA AIRLINES: NAVIGATING CHANGE
In the autumn of 2007, Alaska Airlines executives adjourned at
the end of a long and stressful day in the
midst of a multi-day strategic planning session. Most headed
outside to relax, unwind and enjoy a bonfire
on the shore of Semiahmoo Spit, outside the meeting venue in
Blaine, a seaport town in northwest
Washington state.
Meanwhile, several members of...

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