I am a training to be a educational psychometric tester. I have just about got my head around the statistics side of things. However, I would like to be able to plot a graph to show the results of the tests one person has taken against a normal distribution.
So, for example. These are all standardized test results for different tests from one person, which are each scored out of 130.
Their scores……
Test 1 – 70
Test 2 – 75
Test 3 – 84
Test 4 – 58
Lets say that tests 1 and 2 have confidence levels of 4 and tests 3 and 4 have confidence levels of 8.
The categories for the bell shaped curve would be.
How could I show this data on a graph? Any help appreciated. Dennis
So, for example. These are all standardized test results for different tests from one person, which are each scored out of 130.
Their scores……
Test 1 – 70
Test 2 – 75
Test 3 – 84
Test 4 – 58
Lets say that tests 1 and 2 have confidence levels of 4 and tests 3 and 4 have confidence levels of 8.
The categories for the bell shaped curve would be.
| Standard Scores | Percentile Ranks | Description |
| 130 and above | 98th and above | Well Above Average |
| 116 – 129 | 85th – 97th | Above Average |
| 111 – 115 | 76th – 84th | High Average |
| 90 – 110 | 25th – 75th | Average |
| 85 – 110 | 16th – 24th | Low Average |
| 71 – 84 | 3rd – 15th | Below Average |
| 70 and below | 2nd and below | Well Below Average |
How could I show this data on a graph? Any help appreciated. Dennis
