Measurements of water quality were taken a river downstream from an abandoned chemical dumpsite. Concentrations of a certain chemical were 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, response variable is the connection of the chemical

(b) An experiment was conducted, response variable is the depth of the water

(c) A census was conducted, and the response variables is the depth of the water

(d) An observational study was conducted, and the response variable is the depth of the water

Question

Chemistry

Philip Harrell

17 December, 21:53

Measurements of water quality were taken a river downstream from an abandoned chemical dumpsite. Concentrations of a certain chemical were 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, response variable is the connection of the chemical

(b) An experiment was conducted, response variable is the depth of the water

(c) A census was conducted, and the response variables is the depth of the water

(d) An observational study was conducted, and the response variable is the depth of the water

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Answers (1)

Know the Answer?

Morgan · Answer 1

a. An experiment was conducted, the response variable is the connection of the chemical.

Explanation:

In this study, the chemical that is studied will have maybe different effects or concentrations in the different depths of the river. Is the variable that is expected to be shown.

The researches are going to manipulate the depth of the water that they are going to obtain the samples. This is the manipulate variable because they can modify if they want to obtain the sample at 1 m, 3 m or 5 m. the researches state the depth.

Hope this answer is useful