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As the variability in a population decreases, the sample size should increase.
Testosterone
A primary male sex hormone, though also present in females, involved in the development of male reproductive tissues and secondary sexual characteristics.
Serotonin
A neurotransmitter that contributes to feelings of well-being and happiness, influencing moods, anxiety levels, and the sleep cycle.
HPV
Human Papillomavirus, a common virus that can lead to certain types of cancer as well as warts.
Sexual Desire
The psychological or emotional interest in engaging in sexual activities or fantasies.
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