10. Measurements of water quality were taken from a river downstream from an abandoned chemical dumpsite. Concentrations of a certain chemical were obtained from 9 measurements taken at the surface of the water, 9 measurements taken at mid-depth of the water, and 9 measurements taken at the bottom of the water. What type of study was conducted, and what is the response variable of the study? (A) An experiment was conducted, and the response variable is the concentration of the chemical. (B) An experiment was conducted, and the response variable is the depth of the water. (C) A census was conducted, and the response variable is the depth of the water. (D) An observational study was conducted, and the response variable is the concentration of the chemical. (E) An observational study was conducted, and the response variable is the depth of the water.
10. Measurements of water quality were taken from a river downstream from an abandoned chemical dumpsite. Concentrations of a certain chemical were obtained from 9 measurements taken at the surface of the water, 9 measurements taken at mid-depth of the water, and 9 measurements taken at the bottom of the water. What type of study was conducted, and what is the response variable of the study? (A) An experiment was conducted, and the response variable is the concentration of the chemical. (B) An experiment was conducted, and the response variable is the depth of the water. (C) A census was conducted, and the response variable is the depth of the water. (D) An observational study was conducted, and the response variable is the concentration of the chemical. (E) An observational study was conducted, and the response variable is the depth of the water.
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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
Transcribed Image Text:10. Measurements of water quality were taken from a river downstream from an abandoned chemical dumpsite.
Concentrations of a certain chemical were obtained from 9 measurements taken at the surface of the water,
9 measurements taken at mid-depth of the water, and 9 measurements taken at the bottom of the water. What
type of study was conducted, and what is the response variable of the study?
(A) An experiment was conducted, and the response variable is the concentration of the chemical.
(B) An experiment was conducted, and the response variable is the depth of the water.
(C) A census was conducted, and the response variable is the depth of the water.
(D) An observational study was conducted, and the response variable is the concentration of the chemical.
(E) An observational study was conducted, and the response variable is the depth of the water.
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