RQ:

Is there a significant difference in the mean number of confirmed COVID-19 cases between collective infection clusters (group = TRUE) and individual/isolated infection events (group = FALSE)?

Hypotheses:

H₀ (Null Hypothesis): There is no difference in the mean number of confirmed cases between group = TRUE and group = FALSE infection events.

H₁ (Alternative Hypothesis): There is a difference in the mean number of confirmed cases between group = TRUE and group = FALSE infection events.