Question

The standard normal curve shown here is a probability density curve for a continuous random variable. This means that the area underneath the entire curve is 1. What is the area of the shaded region between the two z-scores indicated in the diagram?

Answer 1

@DDCamp @nathan917 @Numb3r1

Answer 2

usually you use a z-table
Area = P(Z<.86) - P(Z<-1.23)

http://statstutorstl.blogspot.com/2010/07/z-table-gives-probabilty-distribution.html

Answer 3

in my elementary stats class we just used a ti83