Which of these dot plots has a greater sampling variability? What does that imply?
Dot plot A has a greater variability. This implies it has a smaller sample size.
If you were trying to estimate the number of pieces of candy in an average bag of candy, given a choice of using a sample of size 20 or a sample of size 40, which should you choose and why?
You should choose a sample of size 40 because it would result in a smaller sampling variability of the sample mean than it would be for a sample of size 20.
To survey where the eighth grade would like to go for their class trip, who should you survey to result in a population characteristic?
You should survey the entire eighth grade.
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