1. a tour of fundamental statistics introducing Basic Statistics

2. Simple as 1 2 3 Basic Definitions 1CentralTendencies 2StandardDeviation 3Curves Bell and Skewed

3. Centeral Tendecies Mean Mode Median Range 1

4. In statistics, the mean is the mathematical average of a set of numbers. The average is calculated by adding up two or more scores and dividing the total by the number of scores. Example: 99, 97, 95, 93, 93, 93, 87, 85, 83, 62=887/10=88.7 Mean

5. In statistics, the median is the middle number in a given sequence of numbers, taken as the average of the two middle numbers when the sequence has an even number of numbers. Example: 99, 97, 95, 93, 93, 93, 87, 85, 83, 62= 93 Median

6. In statistics, the mode is the number that appears most frequently. Example: 99, 97, 95, 93, 93, 93, 87, 85, 83, 62= 93 the extent to which or the limits between which variation is possible: Mode

7. In statistics, the range is the extent to which or the limits between which variation is possible: Example: 99, 97, 95, 93, 93, 93, 87, 85, 83, 62= 99-62 Range

8. 2 Standard Deviation

9. In statistics, the Standard Deviation is a measure of how spread out numbers are. Example: 1.) 99, 97, 95, 93, 93, 93, 87, 85, 83, 62= sd 10.65051 2.) 99, 97, 95, 89, 84, 82, 76, 70, 66, 62= sd 12.53794 Standard Deviation

10. 3 Curves Normal and Skewed

11. Normal If this graph represents the example above, about 68% of the class scores are between 99 and 87. This represents the normal distribution curve. Example: 99, 97, 95, 93, 93, 93, 87, 85, 83, 62= sd 10.65051

12. Skewed 99, 95, 84, 82, 80, 76, 72, 70, 66, 62= sd 12.53794 This example represents a class with more scores on the lower side of the grading scale. Although the mean might be similar to the example of the class with normal distribution, the standard deviation shows that there are more lower scores with this class.

13. ? But wait… There’s More! This is just a very basic overview of basic descriptive statistics.