Use the Theorem found here: Sum of normally distributed random variables - Wikipedia, the free encyclopedia
Question
height of one row = mean = 20.00cm
std dev = 0.25cm
if a wall has 10 rows (i.e. 10* 20cm = 200cm)
1) what is the distribution of the height?
2) find probability wall height is less than 199cm & greater than 201cm?
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how do you incorporate the 10 rows instead of just one?
Use the Theorem found here: Sum of normally distributed random variables - Wikipedia, the free encyclopedia