medium · Market Microstructure

A statistician is testing a manager for skill where the manager's true alpha is 3% per year and the standard deviation of excess returns is 10%.

How many years of data are required to confirm this skill at a 95% confidence level (one-sided t-test, t_crit = 1.64)?

  1. 100 years
  2. 15 years
  3. 30 years
  4. 11 years

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