Question

for a dailiy airline flight between two cities the number of pieces of checked luggage has a mean of 380and a standard deviation of 20. what number of pieces of checked luggage is 3 standard deviations above the mean

Answer 1

3 sd above the mean; and are we to assume a normal distribution curve?

Answer 2

mean +1sd +1sd +1sd = n

380 +60 = n

440 = n;