UNIT 1 Carles Hidalgo

UNIT 1 Carles Hidalgo

1. CENTRALITY

   • Average
   • Mathematical expectation
   • Median
   • Mode

2. DISPERSION

   • Standar Deviation
   • Covariance
   • Kurtosis
   • Variance
   • Asymmetry Coefficient
   • Tchebychef Inequality

3. SIMPLE REGRESSION

   • Generic Regression
     • Dependant: Knowing one variable we can get the other one
     • Independant: We can´t do the same thing as in the dependant variables.
     • Modelization: We can gent the variables using a modelization
   • Adjusting the line

4. FREQUENCY DISTRIBUTION

   • Absolute Frequency : Its de number of times that value appears in the observations (ni)
   • Relative Frequency: Its the ratio between the absolute frequency and the total number of observations (fi)
   • Relative Cumulative Frequency: Its the sume of the relative frequencies of all values smaller or equal to Xi (Fi)
   • Cumulative Absolute Frequency: Its the sume of absolute frequencies of all values smaller or equal to Xi (Ni)

5. PIECHART: The frecuencies are represented as a sector of a circle, you use this type of chart when the data is relative

6. BARCHART: The frecuencies are represented as vertical bars, you use this type of chart when the data is discrete

7. Quantiles: The number of intervals

   • Quartiles (4)
   • Quintiles (5)
   • Deciles (10)
   • Porcentiles (100)