6. The following data were collected for salinity of water from a sample of municipal sources (in parts per thousand) 0.5 0.5 0.6 0.6 0.8 0.8 0.8 0.9 1.0 1.1 1.3 (a) Find a 98% confidence interval for the average salinity in all mu- nicipal sources in the sampling area. (b) Is there evidence that the average salinity is above 0.6? Test this hypothesis.

6. The following data were collected for salinity of water from a sample of municipal sources (in parts per thousand) 0.5 0.5 0.6 0.6 0.8 0.8 0.8 0.9 1.0 1.1 1.3 (a) Find a 98% confidence interval for the average salinity in all mu- nicipal sources in the sampling area. (b) Is there evidence that the average salinity is above 0.6? Test this hypothesis.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 4GP

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