Statistics: Basic Concepts

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Statistics: Basic Concepts by Mind Map: Statistics: Basic Concepts

1. Statistics

1.1. Is the science of collecting, organizing and analyzing data, so it can be easily interpreted.

1.1.1. Descriptive or Inferential

2. Inferential Statistics

2.1. Interprets data, uses probability as a tool to make conclusions, decisions or production.

2.1.1. j

3. Descriptive Statistics

3.1. Represents data, organized information in a useful way.

3.1.1. Me: Median, Mo: Mod, Std: Standard deviation

4. Sample

4.1. Subset or a portion of the population

4.1.1. j

5. Biased Sample

5.1. A biased sample is one in which the method used to create the sample results in samples that are systematically different from the population.

5.1.1. Target population: citizens of Chula Vista & Sample: Obtained by randomly polluting people outside.

6. Random Sample

6.1. Random sampling is a procedure for sampling from a population in which the selection of a sample unit is based on chance and every element of the population has a known, non-zero probability of being selected.

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7. Population

7.1. All the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding.

7.1.1. Sample or Census

8. Continuous Variable

8.1. Any number with decimals

8.1.1. Time, Height, Weight

9. Discrete Variable

9.1. All whole numbers

9.1.1. Cars, people, pets

10. Quantitative variable

10.1. Numerical

10.1.1. Number of students in the class

11. Qualitative Variable

11.1. Categorical

11.1.1. Gender of persons

12. Absolute

12.1. Not qualified or diminished in any way; total.

13. Frequency

13.1. The rate at which something occurs or is repeated over a particular period of time or in a given sample.

13.1.1. J

14. Relative Frequency

14.1. The number of times that the event occurs during experimental trials, divided by the total number of trials conducted.

14.1.1. J

15. Cummulative Relative Frequency

15.1. Accumulation of the previous relative frequencies.

15.1.1. J

16. Frequency table

16.1. Tools used for organizing data

16.1.1. j

17. Polygon of Frequency

17.1. Graph constructed by using lines to join the midpoints of each interval, or bin.

17.1.1. J

18. Histogram

18.1. A diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval.

18.1.1. j