此次,高顿小编为大家带来了统计的概念和市场回报讲解分析:
  PartⅠ:Statistical Concepts and Market Returns
  Descriptive Statistics & Inferential Statistics
  Population & Sample
  Types of Measurement Scales
  ·Nominal Scales
  ·Ordinal Scales
  ·Interval Scales
  ·Ratio Scales
  Frequency Distribution
 
  ·Absolute frequency & Relative frequency
  ·Cumulative frequency
  ·Histogram & Frequency polygon
  Measures of Central Tendency
  ·Mean;Arithmetic mean;Geometric mean;Weighted mean;Harmonic mean;
  ·Harmonic mean≦geometric mean≦arithmetic mean
  ·Populatin mean(μ)and sample mean(χ)
  ·Median and Mode
  Quantiles
  ·Median;Quartiles;Quintile;Decile;Percentile
  ·if n*percentile is a whole number,Ly=n*y/100
  Measures of Dispersion
  ·Range=maximum value-minimum value
  ·Mean absolute deviation
  ·Variance—Population variance & Sample variance
  ·Standard Deviation:σ S
  ·Semivariance & Target Semivariance
  Relative Disperision
  ·Coefficient of variation:relative disperision:CV=s/X
  ·Sharp Ratio=(R-Rf)/ σ
  Chebyshev’s Inequality
  ·对于任意一组观测值,个体落于均值周围k个标准差之内的概率不小于1-1/k2,其中任意k﹥1.
  Skewness
  ·Symmetrical and nonsymmetrical distributions
 
  ·
 
  ·Positively skewed and negatively skewed
  Kurtosis
  ·Excess kurtosis is measured relative to a normal distribution,which has a kurtosis of 3,Excess kurtosis=sample kurtosis-3
  ·Positive values of excess kurtosis and Negative values of excess kurtosis
  ·0 excess kurtosis indicate mesokurtic distribution
  ·
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