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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: O population parameter O observation O sample statistic O variable b) 2% is a/an O observation O sample statistic O variable population parameter c) A video in your sample is a/an O variable population parameter O observation O sample statistic