Lizbeth Rich is interested in studying the frequency of gardens maintained by octopuses. To do so, she surveys 312 randomly selected octopuses to see if they maintain a garden. Of the 312 octopuses,...

Lizbeth Rich is interested in studying the frequency of gardens maintained by octopuses.  To do so, she surveys 312 randomly selected octopuses to see if they maintain a garden.  Of the 312 octopuses, 23 maintained gardens.  Her research has been published in theAlmanac of Questionable Statistics, Vol 11 (2032).  What is the population of her study?

1. The 23 octopuses who maintained a garden

2. All octopuses

3. Readers of theAlmanac of Questionable Statistics

4. The 312 octopuses surveyed