1.14 Cats on YouTube:  Suppose you want to estimate the percentage of videos on YouTube that are cat videos. It is impossible for you to watch all videos on YouTube so you use a random video picker to select 1000 videos for you. You find that 2% of these videos are cat videos. Determine which of the following is an observation, a variable, a sample statistic, or a population parameter.

a) The percentage of all videos on YouTube that are cat videos is a/an:

b) 2%

c) A video in your sample

d) Whether or not a video is a cat video