What is the best Problem for this experiment?

Hemoglobin is the compound in red blood cells that carries oxygen to the body. the distribution of hemoglobin in women in g/dl of blood is approximately normally distributed with mean 14 and standard deviation 1. too little hemoglobin, and you're anemic. 2. too much, and (unless you live at high altitudes), you can have other problems.

The body is protected against harmful flu viruses by

Hurry where is the majority of earth's water found? o glaciers o oceans ground o rivers and lakes