Problema Solution
Hello,
This is a statistics word problem. Thank you for your help.
The scores from a state standardized test have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Use the Empirical Rule to find the percentage of students with scores between 70 and 130.
Answer provided by our tutors
z=(x-µ)/α
z1=(70-100)/15.
=-2.
z2=(130-100)/15.
=+2.
P(-2
=0.9545.