Question
In: Statistics and Probability
A trucking company wants to find out if their drivers are still alert after driving long...
A trucking company wants to find out if their drivers are still alert after driving long hours. So, they give a test for alertness to two groups of drivers. They give the test to 400 drivers who have just finished driving 4 hours or less and they give the test to 585 drivers who have just finished driving 8 hours or more. The results of the tests are given below.
Passed Failed
Drove 4 hours or
less
310 90
Drove 8 hours or
more
415 170
Is there is a relationship between hours of driving and alertness? (Do a test for independence.) Test at the 1 % level of significance.
Solutions
orchestra answered 1 year agoRelated Solutions
A trucking company wants to find out if their drivers are still alert after driving long...
A trucking company wants to find out if their drivers are still
alert after driving long hours. So, they give a test for alertness
to two groups of drivers. They give the test to 395 drivers who
have just finished driving 4 hours or less and they give the test
to 565 drivers who have just finished driving 8 hours or more. The
results of the tests are given below. Passed Failed Drove 4 hours
or less 290 105 Drove...
A trucking company wants to find out if their drivers are still alert after driving long...
A trucking company wants to find out if their drivers are still
alert after driving long hours. So, they give a test for alertness
to two groups of drivers. They give the test to 400 drivers who
have just finished driving 4 hours or less and they give the test
to 585 drivers who have just finished driving 8 hours or more. The
results of the tests are given below.
Passed Failed
Drove 4 hours or less 310 90
Drove...
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The maintenance manager at a trucking company wants to build a
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engine overhaul based on four explanatory variables: (1) annual
miles driven (in 1,000s of miles), (2) average load weight (in
tons), (3) average driving speed (in mph), and (4) oil change
interval (in 1,000s of miles). Based on driver logs and onboard
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portion of the data...
The maintenance manager at a trucking company wants to build a regression model to forecast the...
The maintenance manager at a trucking company wants to build a
regression model to forecast the time (in years) until the first
engine overhaul based on four explanatory variables: (1) annual
miles driven (in 1,000s of miles), (2) average load weight (in
tons), (3) average driving speed (in mph), and (4) oil change
interval (in 1,000s of miles). Based on driver logs and onboard
computers, data have been obtained for a sample of 25 trucks. A
portion of the data...
The maintenance manager at a trucking company wants to build a regression model to forecast the...
The maintenance manager at a trucking company wants to build a
regression model to forecast the time (in years) until the first
engine overhaul based on four explanatory variables: (1) annual
miles driven (in 1,000s of miles), (2) average load weight (in
tons), (3) average driving speed (in mph), and (4) oil change
interval (in 1,000s of miles). Based on driver logs and onboard
computers, data have been obtained for a sample of 25 trucks. A
portion of the data...
The maintenance manager at a trucking company wants to build a regression model to forecast the...
The maintenance manager at a trucking company wants to build a
regression model to forecast the time (in years) until the first
engine overhaul based on four explanatory variables: (1) annual
miles driven (in 1,000s of miles), (2) average load weight (in
tons), (3) average driving speed (in mph), and (4) oil change
interval (in 1,000s of miles). Based on driver logs and onboard
computers, data have been obtained for a sample of 25 trucks. A
portion of the data...
The maintenance manager at a trucking company wants to build a regression model to forecast the...
The maintenance manager at a trucking company wants to build a
regression model to forecast the time until the first engine
overhaul based on four explanatory variables: (1) annual miles
driven, (2) average load weight, (3) average driving speed, and (4)
oil change interval. Based on driver logs and onboard computers,
data have been obtained for a sample of 25 trucks.
Time Until First Engine
Overhaul (Yrs)
Annual Miles Driven (000)
Average Load Weight (tons)
Average Driving Speed (mph)
Oil...
The maintenance manager at a trucking company wants to build a regression model to forecast the...
The maintenance manager at a trucking company wants to build a
regression model to forecast the time (in years) until the first
engine overhaul based on four explanatory variables: (1) annual
miles driven (in 1,000s of miles), (2) average load weight (in
tons), (3) average driving speed (in mph), and (4) oil change
interval (in 1,000s of miles). Based on driver logs and onboard
computers, data have been obtained for a sample of 25 trucks. A
portion of the data...
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