The article "A Debate in the Dentist's Chair"+ described an ongoing debate over whether newer resin fillings are a better alternative to the more traditional silver amalgam fillings. Because amalgam fillings contain mercury,there is concern that they could be mildly toxic and prove to be a health risk to those with some types of immune and kidney disorders. One experiment described in the article used sheep as subjects and reported that sheeptreated with amalgam fillings had impaired kidney function.(a) In the experiment, a control group of sheep that received no fillings was used but there was no placebo group. Explain why it is not necessary to have a placebo group in this experiment.O Sheep develop kidney diseases from other causes.O People develop impaired kidney functions from other causes.O The experimental subjects were sheep, who would not be aware whether or not they had fillings.O It is hard to get people to sign up for a study involving not filling a hole in their teeth.(b) The experiment compared only an amalgam filling treatment group to a control group. What would be the benefit of also including a resin filling treatment group in the experiment?O To ensure that something else in the process of filling the cavities wasn't causing the kidney problems.O To keep kidney problems from happening.O To stop sheep from escaping from the group.O To ensure that the resin won't cause kidney problems as well.(c) Why do you think the experimenters used sheep rather than human subjects?O It is considered unethical to use humans in an experiment like this.O Sheep cannot lie about their experiences.O It was less expensive to use sheep than humans.O It is easier to give a sheep a filling than a human.

(a) The correct answer is: 3) The experimental subjects were sheep, who would not be aware whether…

Answered: there is concern that they could be…

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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