SOLUTION: Find the z-scores that bound the middle 0.80 of the normal distribution please help I am stuck. I'm not sure if its asking to find 2 z-scores.
![statistics - How do I calculate this standard normal probability with absolute value? - Mathematics Stack Exchange statistics - How do I calculate this standard normal probability with absolute value? - Mathematics Stack Exchange](https://i.stack.imgur.com/d0ftZ.png)
statistics - How do I calculate this standard normal probability with absolute value? - Mathematics Stack Exchange
![Standard Normal Distribution » Biostatistics » College of Public Health and Health Professions » University of Florida Standard Normal Distribution » Biostatistics » College of Public Health and Health Professions » University of Florida](http://phhp-faculty-cantrell.sites.medinfo.ufl.edu/files/2013/02/mod8-image147.png)