The Richter scale magnitude of earthquakes are normally dist

The Richter scale magnitude of earthquakes are normally distributed with a mean of 1.184 and a standard deviation of 0.587.

Earthquakes below 2.000 are considered microearthquakes and are not felt. What proportion are microearthquakes?

What proportion are above 3.000 on the Richter?

What is the 95th percentile?

What you did is correct

You can use excel functiion normdist(2,1.184,0.587,1)

normdist(-3,1.184,0.587,1)

norminv(0.95,1.184,0.587)