STATISTICS AND MORE

STATISTICS AND MORE

1. RANK

   • This represents the difference between the maximum value and the minimum value of the data set whereby we shows how distributed the values are in a Serie
     • the formula is: Range = maximum - the minimum of the table data
       • example
   • Middle range
     • It is calculated by finding the maximum value + minimum divided into 2

2. # of classes "grouped data

   • Range used to divide the set of possible numerical values at work with large amounts of data
     • formula
       • The formula to find the range is: c = 1 + log2 M where M is the sample size can be passed to base 10 of the following formula c = 1 + 3.322 * log N Being N the total data number

3. Medidas de tendencia central

   • It allows us to identify and locate the value point at which gather the central point data
   • Methods used to locate the center point
     • Half
       • It is the sum of all data divided by the number of data
         • FORMULAS
           • This formula is only applicable if the data is they find ungrouped
             • examples
       • Weighted arithmetic mean
         • Used for the data that is they find grouped
           • FORMULAS AND EXAMPLES
     • fashion
       • It is the most repeated value within of the data
       • It can be called bimodal when repeated 2 values and when more than two data are multimodal flame
     • Median
       • The value found is identified in the center of the data that is is the value that is exactly in the half of the data
         • formulas and example
       • It is symbolized with the acronym Me
   • key concepts
     • the measures of central tendency allow us identify the most representative values
       • we divide into 4
         • the average is the average of the data informs us the value that will obtain each of the individuals if the values in equal parts
         • the median is the value that separates the data into equal parts and divide them into 2
         • la moda es el valor que mas se repute en los datos

4. It is the branch of mathematics to gather, organize, present, analyze and interpret the numerical data

   • Descriptive statistics: collection grouping and data presentation
   • nferential statistics methods that make possible get information about of the population
     • Stem and leaf diagram
   • Joint population of all individuals
   • Sample subset of the population is sampling
   • Variable value data
   • Frequency is the number of times it is repeat the value
   • Relative frequency relationship between the number of times the co value is repeated with respect to the total
   • Percentage frequency

5. Correlation coefficients between variables

6. ashion, medium, medium

   • Fashion the first thing to do is the interval is to identify the modal interval
   • to calculate it median first we have to calculate the arithmetic mean
   • mean is used to calculate the mean of the values

7. Variance

   • It allows us to identify the difference on average that there is between each one of the values with respect to average
     • this average was calculated by raising each of the squared differences, adding and dividing them by difference amount

8. deviation

   • Deviation results in the difference between the data and the half
     • to find it, just find the root variance square
       • first step
         • second
           • the standard variation is

9. Medidas de posiccion

   • they are values of the variable that inform us of the place that occupies a data within a ordered data set
     • Cuartiles
       • They are measures that divide the conjunction in 4 equal parts
     • Deciles
       • Cómo se pronuncia the deciles divide the values ​​in 10 equal parts
     • Porcentiles
       • these divide them into 100 equal parts

10. GRAFICAS

    • tools to illustrate and present a data set related to each other, so as to facilitate your understanding, comparison and analysis. The graphics are used to illustrate and present a set of related data, so as to facilitate your understanding, comparison and analysis
      • TYPES OF GRAPHICS
        • Bar graphic. The best known and used of all types of graphics is the graphic or bar chart. ... Pie chart or by sectors. ... histogram. ... Line chart. ... Scatter plot. ... Box and mustache chart. ... Area chart. ... pictogram

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