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dsO2 Above Below 5.2 4.2 4.8 4.4 5.1 4.7 5 4.9 4.9 4.6 4.8 4.8 5 4.9 4.7 4.6 4.7 5.1 5 4.3 4.7 5.5 5.1 4.7 5 4.9 4.9 4.8 4.9 4.7 The Department of Natural Resources (DNR) received a complaint from recreational fishermen that a community was releasing sewage into the river where they fished. These types of releases lower the level of dissolved oxygen in the river and hence cause damage to the fish residing in the river. An inspector from the DNR designs a study to investigate the fishermen's claim. Fifteen water samples are selected at locations on the river upstream from the community and fifteen samples are selected downstream from the community. The dissolved oxygen readings in parts per million are given in dsO2.csv. 1. In order for the discharge to have an impact on fish health, there needs to be at least an .5 ppm reduction in the dissolved oxygen. Do the data provide sufficient evidence that there is a large enough reduction in the mean dissolved oxygen between the upstream and downstream water in the river to impact the health of the fish? Use a = 0.01. 2. Do the required conditions to use the test in part 1 appear to be valid? Explain. 3. Estimate the size of the difference in the mean dissolved oxygen readings for the two locations on the river using a 99% confidence interval.

dsO2 Above Below 5.2 4.2 4.8 4.4 5.1 4.7 5 4.9 4.9 4.6 4.8 4.8 5 4.9 4.7 4.6 4.7 5.1 5 4.3 4.7 5.5 5.1 4.7 5 4.9 4.9 4.8 4.9 4.7 The Department of Natural Resources (DNR) received a complaint from recreational fishermen that a community was releasing sewage into the river where they fished. These types of releases lower the level of dissolved oxygen in the river and hence cause damage to the fish residing in the river. An inspector from the DNR designs a study to investigate the fishermen's claim. Fifteen water samples are selected at locations on the river upstream from the community and fifteen samples are selected downstream from the community. The dissolved oxygen readings in parts per million are given in dsO2.csv. 1. In order for the discharge to have an impact on fish health, there needs to be at least an .5 ppm reduction in the dissolved oxygen. Do the data provide sufficient evidence that there is a large enough reduction in the mean dissolved oxygen between the upstream and downstream water in the river to impact the health of the fish? Use a = 0.01. 2. Do the required conditions to use the test in part 1 appear to be valid? Explain. 3. Estimate the size of the difference in the mean dissolved oxygen readings for the two locations on the river using a 99% confidence interval.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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By using R studio : solve problems 1,2 and 3

dsO2 Above Below 5.2 4.2 4.8 4.4 5.1 4.7 5 4.9 4.9 4.6 4.8 4.8 5 4.9 4.7 4.6 4.7 5.1 5 4.3 4.7 5.5 5.1 4.7 5 4.9 4.9 4.8 4.9 4.7
Transcribed Image Text:dsO2 Above Below 5.2 4.2 4.8 4.4 5.1 4.7 5 4.9 4.9 4.6 4.8 4.8 5 4.9 4.7 4.6 4.7 5.1 5 4.3 4.7 5.5 5.1 4.7 5 4.9 4.9 4.8 4.9 4.7
The Department of Natural Resources (DNR) received a complaint from recreational fishermen that a community was releasing sewage into the river where they fished. These types of releases lower the level of dissolved oxygen in the river and hence cause damage to the fish residing in the river. An inspector from the DNR designs a study to investigate the fishermen's claim. Fifteen water samples are selected at locations on the river upstream from the community and fifteen samples are selected downstream from the community. The dissolved oxygen readings in parts per million are given in dsO2.csv. 1. In order for the discharge to have an impact on fish health, there needs to be at least an .5 ppm reduction in the dissolved oxygen. Do the data provide sufficient evidence that there is a large enough reduction in the mean dissolved oxygen between the upstream and downstream water in the river to impact the health of the fish? Use a = 0.01. 2. Do the required conditions to use the test in part 1 appear to be valid? Explain. 3. Estimate the size of the difference in the mean dissolved oxygen readings for the two locations on the river using a 99% confidence interval.
Transcribed Image Text:The Department of Natural Resources (DNR) received a complaint from recreational fishermen that a community was releasing sewage into the river where they fished. These types of releases lower the level of dissolved oxygen in the river and hence cause damage to the fish residing in the river. An inspector from the DNR designs a study to investigate the fishermen's claim. Fifteen water samples are selected at locations on the river upstream from the community and fifteen samples are selected downstream from the community. The dissolved oxygen readings in parts per million are given in dsO2.csv. 1. In order for the discharge to have an impact on fish health, there needs to be at least an .5 ppm reduction in the dissolved oxygen. Do the data provide sufficient evidence that there is a large enough reduction in the mean dissolved oxygen between the upstream and downstream water in the river to impact the health of the fish? Use a = 0.01. 2. Do the required conditions to use the test in part 1 appear to be valid? Explain. 3. Estimate the size of the difference in the mean dissolved oxygen readings for the two locations on the river using a 99% confidence interval.
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