Provide a 2-3 page research paper on one individual who contributed to the world of statistics.（Karl Person）
The paper will include the following:
1. A brief biography of the individual you selected.
2. What was, or were the contribution(s) this individual made to the science of statistics?
3. The purpose or reason(s) he/she developed this, or these specific statistical formulae.Indicate how we use this person's contribution(s) today. If several contributions indicate briefly how we use them today.
Additional criteria: at least three sources(allow to use Wikipedia), APA style. No plagiarism.