STATISTICS

STATISTICS

1. ¿ whats is it ?

   • is a branch of mathematics dealing with the collection, analysis, interpretation, presentation and organization of data

2. You can do the analysis by

   • DESCRIPTIVE STATISTICS
     • this analysis of data that helps describe, show or summarize data in a meaningful
       • this does not give us any conclusions , is a simply for to describe our data
         • there are two ways to describe the data
           • Measures of central tendency
             • this describe the central position of a frequency distribution
               • MEAN
                 • is the average of all numbers and is sometimes called the arithmetic mean
               • MEDIAN
                 • is the middle score for a set of data that has been in order of magnitude
               • MODE
                 • is the most frequent score in our data set
                   • • when we use descriptive statistics, we use
                       • Graphs, graphical description
                       • Tables
                       • Discussion of the results
           • measures of spread
             • this help us to summarize how spread out these score are
               • range
                 • variance
                   • standard deviation
                 • quartiles
                   • absolute deviation
   • INFERENTIAL STATISTICS
     • this looks at the data in generalized way
       • but is important that the sample accurately represents the population
       • the methods are
         • the estimation of parameters
         • testing of statistics hypotheses