STATISTICS

STATISTICS

1. RANK

   • This represents the difference between the maximum value and the minimum value of the data set which shows us how distributed are the values ​​in a series
     • the formula is: Range = maximum - the minimum of table data
       • example
   • rank means, medium
     • It is calculated by finding the maximum + minimum value divided into 2

2. Number of lessons

   • Range used to divide the set of possible values numeric when working with large amounts of data
     • formula
       • c = 1 + log2 M where M is the sample size You can go to the base 10 lodgarimo of the following formula c = 1 + 3.322 * log N Being N the total number of data

3. Measures of central tendency

   • It allows us to identify and locate the value point at which data is collected central point
   • 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 found ungrouped
             • examples
       • Artistic stocking weighted
         • Used for the data that they are grouped
           • formulas and example
     • fashion
       • It is the most repeated value within the data
       • It could be called bimodal when repeat 2 values ​​and when they are more of two data is called multimodal
     • Median
       • The value found in the center of the data is the value which is exactly in the middle of data
         • formulas and example
       • It is symbolized by the acronym Me
   • In conclusion the trend mediated central allow us to identify the values more representative of the data
   • In conclusion
     • the measures of central tendency we allow you to identify more values representative
       • They are divided into
         • the average is the average of the data informs us the value that each individual will obtain if values ​​are distributed equally
         • the median is the value that separates the data in equal parts and divides them into 2
         • fashion is the value that I know most reputation in the data

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

   • Descriptive statistics: collection data grouping and presentation
   • It is the branch of mathematics to gather, organize, present, analyze and interpret the numerical data
     • Stem Diagram and leaves
   • Joint population of all individuals
   • Sample sunconjoto of the population is the mostreo
   • Value data of the variable Cómo se pronuncia
   • Frequency is the number of times the value is repeated
   • Relative frequency existing relationship Enter the number of times the value with respect to the total
   • Frequency percentage

5. Correlation coefficients between variables

6. fashion, 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 average arithmetic
   • mean is used to calculate the mean of the values

7. Varianza

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

8. desviaccion

   • Deviation gives us common result the difference there is between the data and the average
     • to find it, just find the square root of the variance

9. Measures of position

   • are values ​​of the variable that we they report the place that a data within a data set organized
     • Cuartiles
       • on measures that divide us on set in 4 equal parts
     • Deciles
       • the deciles divide the values ​​in 10 parts equals
     • Porcentiles
       • these divide them into 100 parts equals

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