Behavioral Sciences STAT (with CourseMate Printed Access Card) (New, Engaging Titles from 4LTR Press)
Behavioral Sciences STAT (with CourseMate Printed Access Card) (New, Engaging Titles from 4LTR Press)
2nd Edition
ISBN: 9781285458144
Author: Gary Heiman
Publisher: Cengage Learning
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Chapter 8, Problem 12SP

A researcher predicts that smoking cigarettes decreases a person’s sense of smell. On a test of olfactory sensitivity, the μ for nonsmokers is 18.4. A sample of 12 people who smoke a pack a day produces X ¯ = 16.25 ,   s x 2 = 4.75 . (a) What are H 0 and H a for this study? (b) Compute t obt . (c) What is your t crit ? (d) What should the researcher conclude about this relationship? (e) Report your results using the correct format. (f) Compute the confidence interval for μ if appropriate.

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The increase in carbon dioxide (CO2) in the atmosphere is a major cause of global warming. Using data obtained by Charles David Keeling, professor at Scripps Institution of Oceanography, the average amount of CO2 in the atmosphere from 1958 through 2016 is approximated by A(t) = 0.012414t2 + 0.7485t + 313.9    (1 ≤ t ≤ 59) where A(t) is measured in parts per million volume (ppmv) and t in years, with  t = 1  corresponding to 1958.† Find the average amount of CO2 in the atmosphere from 1958 through 2016. (Round your answer to two decimal places.) ______ ppmv/yr
The increase in carbon dioxide (CO2) in the atmosphere is a major cause of global warming. Using data obtained by Charles David Keeling, professor at Scripps Institution of Oceanography, the average amount of CO2 in the atmosphere from 1958 through 2016 is approximated by A(t) = 0.012414t2 + 0.7485t + 313.9    (1 ≤ t ≤ 59)   where A(t) is measured in parts per million volume (ppmv) and t in years, with t = 1 corresponding to 1958.† Find the average rate of increase of the average amount of CO2 in the atmosphere from 1958 through 2016. (Round your answer to two decimal places.)

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Behavioral Sciences STAT (with CourseMate Printed Access Card) (New, Engaging Titles from 4LTR Press)

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