A soft drink company fills two-liter bottles on several different lines of production equipment. The fill volume of its new machine is normally distributed with a mean of 2.01 liters and a variance of 0.04 liter2 .
a) Find the probability that a randomly selected two-liter bottle would contain between 1.98 and 2.06 liters.
b) The company want to define a minimum threshold of the fill volume so it can guarantee to their customers that 85% of their bottles are filled to the threshold above. Find the threshold.
a.
μ = 2.01, σ = 0.2
We need to compute Pr ( 1.98 ≤ X ≤ 2.06). The corresponding z-values needed to be computed are:
Therefore, we get:
the probability that a randomly selected two-liter bottle would contain between 1.98 and 2.06 liters is 0.1583
b.
The company wants to define a minimum threshold of the fill volume so it can guarantee to its customers that 85% of their bottles are filled to the threshold above the minimum threshold is 2.217287.
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