Question

HELP!! WILL GIVE BRAINLIEST!!
A researcher wanted to study the effects of a certain chemical on cell growth. The chemical was to be applied at two different doses, high and low, to two different cell types, strain A and strain B. Each combination of dose and cell type was to be replicated ten times. To have consistency from one replicate to the next, the researcher decided to use four lab technicians. One technician would be assigned the high dose with strain A. A second would be assigned the low dose with strain A. A third would be assigned the high dose with strain B. A fourth would be assigned the low dose with strain B. The assignment of lab technician to the replicates for a combination of dose and cell type would be randomized. A statistician told the researcher that the design could be improved by controlling confounding variables. Which of the following is potentially a confounding variable in this study?
A)Chemical used
b) Lab technician
c) dose
d) cell type
e) cell growth

Answer 1

Answer:

Lab technician

Explanation:

Chemical used is the main independent variable. Cell growth was the dependent variable or response variable. The cell type and dose are both being tested within the experiment leaving lab technician.

Answer 2

The  LAB TECHNICIAN is the confounding variable in this study (Option B).

A confounding variable is a variable that can affect other variables and therefore it can generate distortion in the association between two variables.

Thus, a confounder variable could negatively influence the association between the dependent variable and the independent variable.

In this case, different lab technicians can affect the manner in which each experimental treatment is applied.

In conclusion, the LAB TECHNICIAN is the confounding variable in this study (Option B).

Learn more in:

https://brainly.com/question/10458420?referrer=searchResults