Question

Budgets for team marketing projects are normally distributed with a mean of $860 and a standard deviation of $30. What percentage of budgets is within $800 to $900?

Answer 1

Z values are -2 and 1.33
=P(Z<1.33) - P(Z<-2)
use Z table in back of book or look up one, excel has a normdist function as well
=.8854