Advanced Placement (AP), 16.10.2020 22:01 Demarco17
At some fast-food restaurants, customers who want a lid for their drinks get them from a large stack near the straws, napkins, and condiments. The lids are made with a small amount of flexibility so they can be stretched across the mouth of the cup and then snugly secured. When lids are too small or too large, customers can get very frustrated, especially if they end up spilling their drinks. At one particular restaurant, large drink cups require lids with a “diameter” of between 3.95 and 4.05 inches. The restaurant’s lid supplier claims that the diameter of its large lids follows a Normal distribution with mean 3.98 inches and standard deviation 0.02 inch. Assume that the supplier’s claim is true. The supplier is considering a change to reduce to 1% the percentage of its large cup lids that are too small. One strategy is to alter the production process, thereby decreasing the standard deviation of the lid diameters.
If the mean diameter stays at =3.98 inches, what value of the standard deviation will result in only 1% of lids that are too small to fit?
1. 0.0198 inches
2. 0.070 inches
3. 3.00 inches
4. 0.013 inches
5. 0.427 inches
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At some fast-food restaurants, customers who want a lid for their drinks get them from a large stack...
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