Final answer:
To investigate the hypothesis, conduct an experiment with an experimental group and a control group. Compare infection rates and use statistical tests to analyze the data.
Step-by-step explanation:
To investigate the hypothesis that substance V decreases the possibility of infection by the COVID-19 virus, you would conduct an experiment in two separate laboratories using an experimental design and statistical tests. The experimental design would involve creating two groups: an experimental group and a control group. The experimental group would be administered substance V, while the control group would not receive substance V. After a certain time period, you would compare the infection rates between the two groups and analyze the data using statistical tests, such as the chi-square test or the t-test, to determine if there is a statistically significant difference in infection rates.