Normal distribution probability
Issues getting to the bottom of a HW problem, but I am not looking for the answer, just some guidance.
x has a normal distribution with the specified mean = 15.9 and standard deviation = 3.6
Find the indicated probability P(10 ≤ x ≤ 26)?
I assume i need to take the values 10 and 26 and calculate Z-Scores, and then go the Z-Score table and take the differences in the P-Values? Is this the right approach or am I missing something? I followed that reasoning and the answer was wrong - so either I made a rounding mistake, or have chosen the wrong path.
Thank you for the advice in advance.