July sales for Melodic Kortholt, Ltd , average 1 $9,500 with 12 5 $1,250 August sales average 2 $7,400 with 22 $1,425 September sales average 3 $8,600 with 32 $1,610 (a) Find the mean and standard deviation of total sales for the third quarter (b) What assumptions are you making ...

a Applying Rule 3 we add the means for each month to get 9500 7400 8600 25500 Applying ...

July sales for Melodic Kortholt, Ltd., average 1 = $9,500 with 12 5 $1,250. August sales average

Question:

July sales for Melodic Kortholt, Ltd., average μ1 = $9,500 with σ12 5 $1,250. August sales average μ2 = $7,400 with σ22 = $1,425. September sales average μ3 $8,600 with σ32 = $1,610.
(a) Find the mean and standard deviation of total sales for the third quarter.
(b) What assumptions are you making?