As men age, their testosterone levels gradually decrease. This may cause a reduction in energy, an increase in fat, and otherundesirable changes. Do testosterone supplements reverse some of these effects? A study in the Netherlands assigned 237 menaged 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?Every experiment needs a control group in order to make proper comparisons between treatments.A control group is necessary to balance the effects of other variables among the treatment groups.A control group is necessary so any differences in the effects of the treatments can be distinguished from chancedifferences between the groups.A control group helps avoid confounding and reduces variability in the response variable.A control group is used to provide a baseline for comparing the effects of other treatments.

Here, we are given a study of 237 men aged 60 to 80 years with low or low normal levels of…

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?