There is a group of portfolio managers who each have a 50% chance of beating the market by 10% in a given year and a 50% chance of underperforming by 10%. Performance from one year to the next is independent and uncorrelated. Returns are simple returns, and compounding is ignored. Suppose that unsuccessful managers get forced out of the business as soon as they are down overall 30% - that is, as soon as their record contains 3 more losing years than winning years. What is the probability of failure over a period of 5 years? Express your answer as an exact fraction (i.e. do not enter a real number).

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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.