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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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Question

As men age, their testosterone levels gradually decrease. This may cause a reduction in energy, an increase in fat, and other undesirable changes. Do testosterone supplements reverse some of these effects? A study in the Netherlands assigned 237 men aged 60 to 80 with low or low-normal testosterone levels to either a testosterone supplement or a placebo.

**Why is it necessary to include a control group in this experiment?**

- O Every experiment needs a control group in order to make proper comparisons between treatments.

- O A control group is necessary to balance the effects of other variables among the treatment groups.

- O A control group is necessary so any differences in the effects of the treatments can be distinguished from chance differences between the groups.

- O A control group helps avoid confounding and reduces variability in the response variable.

- O A control group is used to provide a baseline for comparing the effects of other treatments.

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