In Hawaii shark attacks are very rare. Furthermore, about 55% of all shark attacks are serious, but not fatal.† You are scheduled to give a talk at a local scuba club in Honolulu and want to include a brief statistical profile regarding the most recent five shark attacks, all of which were nonfatal. Let r be the number of nonfatal attacks out of a random sample of five shark attacks. (d) What is the expected number of nonfatal shark attacks out of the five? What is the standard deviation of the r-probability distribution? (Round your answer to three decimal places.)

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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.