Answer:4.375
Step-by-step explanation:
According to the empirical rule, roughly 68% of the scores fall between z = -1 and z = 1
You can use a calculator to get a more approximate answer. If you have a TI calculator, you can use the "normalcdf" function to type in normalcdf(-1,1)
Just write all of that but instead of in the box between each statement and reason write if then