Merge pull request datasciencemasters#115 from siyaoxu/siyaoxu-patch-1

Create statistics-review.md

Author: clarecorthell

statistics-review.md

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+If you need a quick but comprehensive review on probability and statistics, the following courses from JHU are what you are looking for. A more efficient way maybe starting by doing the exercises before getting sleepy during the video :-)
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+[Coursera JHU Biostatistics Bootcamp I](https://www.coursera.org/learn/biostatistics/home/welcome)
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+[Coursera JHU Biostatistics Bootcamp II](https://www.coursera.org/learn/biostatistics-2)
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