常见非参数法 Statistical Procedures for Hypothesis Testing that o Because they are based on Counts or Ran o A Random Sample is still required The Nonparametric Approach Based on a Count the number of times some event occurs a Use the binomial distribution to decide whether this count is reasonable or not under the null hypothesis The Nonparametric Approach Based on o Replace each data value with its rank( a Use formulas and ta bles created for testing ranks常见非参数法 Statistical Procedures for Hypothesis Testing that do Not Require a Normal Distribution  Because they are based on Counts or Ranks  A Random Sample is still required The Nonparametric Approach Based on Counts  Count the number of times some event occurs  Use the binomial distribution to decide whether this count is reasonable or not under the null hypothesis The Nonparametric Approach Based on Ranks  Replace each data value with its rank (1, 2, 3, …)  Use formulas and tables created for testing ranks