1. This is about two populations comparison. Is this for two population Proportions comparison?

   If your answer is No, that indicates the problem is for two population means comparison.

   Tip: Similar to the garlic example in the video, two nominal variables (one is Placebo or New Drug the other is whether the person caught a cold or not), that is the comparison of the population proportion. On the other hand, one variable is nominal ( Placebo or New Drug) and the other is a ratio variable (number of days to recover). This is the comparison of population means.

   Yes

   No