EVERYTHING YOU NEED TO KNOW STATISTICS

EVERYTHING YOU NEED TO KNOW STATISTICS

1. RANK

   • It is the difference between the maximum value and the minimum value of the data set so it shows us how distributed values ​​are in a series
     • the formula is: Range = maximum - the minimum of table data
       • example
   • rank means, medium
     • It has to be calculated by finding the maximum value + minimum divided in 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 can be passed to the lodgarimo of base 10 of the following formula c = 1 + 3.322 * log N Being N the total number of data

3. measures of central decency

   • the formula allows us to identify and locate the value point at which gather the central point data
   • Methods used to locate the point central
     • 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
       • Artistic stocking weighted
         • Utilizada para los datos que se encuentran agrupados
           • FORMULAS AND EXAMPLES
     • Moda
       • In statistics, fashion is the most frequently value in one of the data distributions. This is in the form of a column when we find two fashions, that is, two data that have the same maximum absolute frequency.
       • It could be called bimodal when repeat 2 values ​​and when they are more than two data is called multimodal
     • 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 I
   • concepts keys
     • the measures of central tendency we allow you to identify more values representative
       • we can divide into
         • the average is the average of the data informs us the value that will obtain each of the individuals if the values ​​are distributed in equal parts
         • the median is the value that separates the data into equal parts and divide them into 2
         • fashion is the value that more is repeated in the data

4. Study that gathers, classifies and counts all facts that have a certain characteristic in common, to be able to reach conclusions from the numerical data extracted.

   • Descriptive statistics: collection data grouping and presentation
   • Differential statistics methods that do possible to get information about the population
     • Stem Diagram and leaves
   • Joint population of all the individuals
   • In statistics, a sample is a subset of cases or individuals from a population. In various applications it is important that a sample is representative and for this a technique must be chosen
   • Value data of The variable
   • Frequency is the number of times that the value is repeated
   • Relative frequency relationship between the number of times the co value is repeated with respect to the total
   • Frequency percentage

5. fashion, half, median

   • 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

6. Variance

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

7. deviation

   • Deviation gives us the common result difference between the data and the half
     • to find it, just find the square root of the variance
       • first He passed
         • second He passed
           • the variation standard is

8. What are the measures of position

   • are values ​​of the variable that we report the place that occupies a data within a set of ordered data
     • Quartiles
       • They are measures that divide us set in 4 equal parts
     • Deciles
       • the deciles divide the values ​​in 10 parts equals
     • Percentiles
       • these divide them into 100 parts equals

9. DIFFERENT TYPES GRAPHICS

   • A graph or graphical representation is a type data representation, usually numerical, through visual resources, to visually manifest the relationship mathematics or statistical correlation that they keep each other
     • TYPES 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. ... pic

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