Water analysis is performed at 32 points and the pollution level (y) in the water is measured as ppm. The information is as follows. n 32 y average 28 s 7 a)Provide sufficient evidence at alpha 0.05 that the average pollution level is higher than 30 ppm, do the appropriate test. b)Create a 95 percent confidence interval for the average pollution level of the population

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
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Water analysis is performed at 32 points and the pollution level (y) in the water is measured as ppm. The information is as follows.

n

32

y average

28

s

7

a)Provide sufficient evidence at alpha 0.05 that the average pollution level is higher than 30 ppm, do the appropriate test.

b)Create a 95 percent confidence interval for the average pollution level of the population

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