Earth's atmosphere long ago, we can examine the gas in cient amber. Measurements taken from 9 specimens of ceous era (75-95 million years ago) show concentrations of 95,900 parts per million and a standard deviation of interval for the mean concentration of nitrogen in the late tudent's t-distribution. f freedom. em is: t is: 4,000 7,000 D,000 0,000 2,000

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To discover the nature of Earth's atmosphere long ago, we can examine the gas in
bubbles trapped inside ancient amber. Measurements taken from 9 specimens of
amber from the late Cretaceous era (75-95 million years ago) show concentrations of
nitrogen with a mean of 595,900 parts per million and a standard deviation of
62,550 ppm.
Devise a 95% confidence interval for the mean concentration of nitrogen in the late
Cretaceous era. Use the Student's t-distribution.
There are
degrees of freedom.
The t-value for this problem is:
The 95% Confidence Limit is:
8, 2.31, 548,000 - 644,000
9, 1.85, 575,000 - 617,000
8, 2.44, 582,000 - 610,000
9, 2.44, 582,000 - 610,000
8, 1.15, 563,000 - 629,000
Transcribed Image Text:To discover the nature of Earth's atmosphere long ago, we can examine the gas in bubbles trapped inside ancient amber. Measurements taken from 9 specimens of amber from the late Cretaceous era (75-95 million years ago) show concentrations of nitrogen with a mean of 595,900 parts per million and a standard deviation of 62,550 ppm. Devise a 95% confidence interval for the mean concentration of nitrogen in the late Cretaceous era. Use the Student's t-distribution. There are degrees of freedom. The t-value for this problem is: The 95% Confidence Limit is: 8, 2.31, 548,000 - 644,000 9, 1.85, 575,000 - 617,000 8, 2.44, 582,000 - 610,000 9, 2.44, 582,000 - 610,000 8, 1.15, 563,000 - 629,000
A hydrologist is interested in studying the influence of rainfall on runoff in a drainage
basin. Rainfall and runoff are measured during 20 rainfall events. Model the
relationship.
What are the variables and the type of measurement for these variables?
slope (numerical) and itercept (numerical)
dependent variable (nominal) and independent vatiable (nominal)
Rainfall (total mm) and Runoff (liters/36 hours)
geographic location (lat/long), area of watershed (hectares), and substrate type
(rock/soil/vegitation)
rainfall (numerical) and runoff (numerical)
Transcribed Image Text:A hydrologist is interested in studying the influence of rainfall on runoff in a drainage basin. Rainfall and runoff are measured during 20 rainfall events. Model the relationship. What are the variables and the type of measurement for these variables? slope (numerical) and itercept (numerical) dependent variable (nominal) and independent vatiable (nominal) Rainfall (total mm) and Runoff (liters/36 hours) geographic location (lat/long), area of watershed (hectares), and substrate type (rock/soil/vegitation) rainfall (numerical) and runoff (numerical)
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