Petroleum pollution in oceans stimulates the growth of certain bacteria. An assessment of this growth has been made by counting the bacteria in each of 6 randomly chosen specimens of ocean water (of a fixed size). The 6 counts obtained were as follows. 43 , 44 , 57 , 59 , 67 , 48 Find the of this sample of numbers. Round your answer to two decimal places. (If necessary, consult a list of formulas.) .

1. Phospholipids are said to be amphipathic. What does it mean to be amphipathic? It means that
phospholipids have one end being hydrophobic and one end being hydrophilic It means that
phospholipids have both ends being hydrophilic It means that phospholipids have both ends
being hydrophobic It means that phospholipids are unsaturated lipids