A researcher wants to be 95% confident in the proportion of people with an aquarium at home. A previous study shows that 21% of those interviewed had an aquarium at home. A) If the researchers wants to be accurate within 2% of the true proportion of aquarium owners, find the sample size (n) necessary for the study. Use the z table for this question. B) Assume there is no information available about the percentage of people with aquariums at home. Fill in the sample size (n) necessary under this different condition.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.