An ecologist studying starfish populations collects the following data on randomly selected 1-meter by 1-meter plots on a rocky coastline --The number of starfish in the plot
--The total weight of starfish in the plot
--The percentage of area in the plot that is covered by barnacles (food for starfish)
--Whether or not the plot is underwater midway between high and low tide
How many of these measurements can be treated as contituous random variables and how many as discrete random variables?