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In West Texas, water is extremely important. The following data represent pH levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 is acidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.t These data are also available for download at the Companion Sites for this text. For convenience, the data are presented in increasing order. x: pH of Ground Water in 102 West Texas Wells 7.1 7.1 7.1 7.1 7.1 7.1 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.4 7.4 7.4 | 7.4 7.4 7.4 7.4 7.4 7.4 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.7 |7.7 | 7.7 7.7 7.7 7.7 7.8 7.8 7.8 7.8 7.8 7.9 | 7.9 7.9 | 7.9 | 7.9 8.0 8.1 8.1 8.1 8.1 8.1 8.4 8.5 8.6 8.7 8.8 8.8 8.1 8.1 8.2 8.2 8.2 8.2 8.2 8.2 8.2 Compute a 75% Chebyshev interval centered on the mean. (Round your answers to two decimal places.)

In West Texas, water is extremely important. The following data represent pH levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 is acidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.t These data are also available for download at the Companion Sites for this text. For convenience, the data are presented in increasing order. x: pH of Ground Water in 102 West Texas Wells 7.1 7.1 7.1 7.1 7.1 7.1 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.4 7.4 7.4 | 7.4 7.4 7.4 7.4 7.4 7.4 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.7 |7.7 | 7.7 7.7 7.7 7.7 7.8 7.8 7.8 7.8 7.8 7.9 | 7.9 7.9 | 7.9 | 7.9 8.0 8.1 8.1 8.1 8.1 8.1 8.4 8.5 8.6 8.7 8.8 8.8 8.1 8.1 8.2 8.2 8.2 8.2 8.2 8.2 8.2 Compute a 75% Chebyshev interval centered on the mean. (Round your answers to two decimal places.)

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.6: Applications And The Perron-frobenius Theorem
Problem 22EQ
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Compute a 75% Chebyshev interval centered on the mean. (Round your answers to two decimal places.) 

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In West Texas, water is extremely important. The following data represent pH levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 is acidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.t These data are also available for download at the Companion Sites for this text. For convenience, the data are presented in increasing order. x: pH of Ground Water in 102 West Texas Wells 7.1 7.1 7.1 7.1 7.1 7.1 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.4 7.4 7.4 | 7.4 7.4 7.4 7.4 7.4 7.4 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.7 |7.7 | 7.7 7.7 7.7 7.7 7.8 7.8 7.8 7.8 7.8 7.9 | 7.9 7.9 | 7.9 | 7.9 8.0 8.1 8.1 8.1 8.1 8.1 8.4 8.5 8.6 8.7 8.8 8.8 8.1 8.1 8.2 8.2 8.2 8.2 8.2 8.2 8.2 Compute a 75% Chebyshev interval centered on the mean. (Round your answers to two decimal places.)
Transcribed Image Text:In West Texas, water is extremely important. The following data represent pH levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 is acidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable.t These data are also available for download at the Companion Sites for this text. For convenience, the data are presented in increasing order. x: pH of Ground Water in 102 West Texas Wells 7.1 7.1 7.1 7.1 7.1 7.1 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.2 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.4 7.4 7.4 | 7.4 7.4 7.4 7.4 7.4 7.4 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.7 |7.7 | 7.7 7.7 7.7 7.7 7.8 7.8 7.8 7.8 7.8 7.9 | 7.9 7.9 | 7.9 | 7.9 8.0 8.1 8.1 8.1 8.1 8.1 8.4 8.5 8.6 8.7 8.8 8.8 8.1 8.1 8.2 8.2 8.2 8.2 8.2 8.2 8.2 Compute a 75% Chebyshev interval centered on the mean. (Round your answers to two decimal places.)
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