We are curious about the average number of Facebook friends that college students have. We take a simple random sample of 40 students and record the number of Facebook friends each student has. 1. Is the 99% Confidence Interval narrower or wider than the 95% (300.26, 416.54)? Why?  2. Your friend claims that he heard that the average number of Facebook friends was 300 in 2010. You suspect that the average has increased. Write down the null and alternative hypotheses you would need to perform a hypothesis test.

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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.