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

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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Not sure how to do 10.37

10.37 Dissolved O, Content, continued Refer to
Exercise 10.13, in which we measured the dissolved
oxygen content in river water to determine whether a
stream had sufficient oxygen to support aquatic life.
A pollution control inspector suspected that a river
community was releasing amounts of semitreated
sewage into a river. To check his theory, he drew
five randomly selected specimens of river water at
a location above the town, and another five below.

dissolved oxygen contents for locations above and
below the town. Use a 95% confidence interval.
The dissolved oxygen readings (in parts per million)
are as follows:
Above town
4.8
5.2
5.0
4.9
5.1
Below town
5.0
4.7
4.9
4.8
4.9
a. Do the data provide sufficient evidence to indicate
that the mean oxygen content below the town is less
than the mean oxygen content above? Test using
= 0.05.
b. Suppose you prefer estimation as a method of
inference. Estimate the difference in the mean
Data
to

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