In the 2012 presidential pre-election surveys, Pew Research sampled 1,112 likely voters during October 4–7, 2012, and asked if they were planning to vote for Obama, and then asked the same question of a sample of 1,495 likely voters taken from October 24–28, 2012. However, in their last survey taken October 31–November 3, 2012, just before the election held on November 6, 2012, they asked this question of a sample of 2,709 likely voters. Why do you think Pew did this? (Select all that apply.) Larger samples provide better information about the population. The polling organization wants to increase the accuracy of its population. Larger samples provide better information about the poll. Larger samples provide better information about the sample. The polling organization wants to increase the accuracy of its results.

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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.