Researchers at a weather center in the northeastern United States recorded the number of 90 Degree Fahrenheit days each year since records first started in 1875. The numbers form a normal-shaped distribution with a mean of μ = 9.6 and a standard deviation of σ = 1.9. To see if the data showed any evidence of global warming, they also computed the mean number of 90 Degree days for the most recent n = 4 years and obtained M = 12.25. Do the data indicate that the past four years have had significantly more 90 Degree days than would be expected for a random sample from this population? Use a one-tailed test with α = .05.
Researchers at a weather center in the northeastern United States recorded the number of 90 Degree Fahrenheit days each year since records first started in 1875. The numbers form a normal-shaped distribution with a mean of μ = 9.6 and a standard deviation of σ = 1.9. To see if the data showed any evidence of global warming, they also computed the mean number of 90 Degree days for the most recent n = 4 years and obtained M = 12.25. Do the data indicate that the past four years have had significantly more 90 Degree days than would be expected for a random sample from this population? Use a one-tailed test with α = .05.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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Researchers at a weather center in the northeastern United States recorded the number of 90 Degree Fahrenheit days each year since records first started in 1875. The numbers form a
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