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A bottling plant wants to sell bottles with one liter of water. The amount of water filled by the machine, while remaining close to one litre, varies from bottle to bottle. The amounts filled in bottles can be modeled as a normal with standard deviation o and mean 1 liter . The manufacturer wants to set o such that nearly 38.3 percent has fill between 0.95 and 1.05 liters. To achieve this o shoud be set close to 0.1 0.05 0.2 0.04 Submit Answer Tries 0/4
An advertising research study indicates that 30 % of the viewers exposed to an advertisement try the product during the following four months. If 100 people are exposed to the ad, find an approximate value of the probability, that at least 25 of them will try the product in the following four months? Choose the closest answer. 0.4864 0.9997 0.3621 0.8641 Submit Answer Tries 0/4
The number of votes cast in favor of a controversial proposition is believed to be approximately normally distributed with mean 7000 and standard deviation 500. The proposition needs at least 7835 votes in order to pass. What is the probability that the proposition will pass? (Assume numbers are on a continuous scale.) .5575 .9525 .0475 .4525 Submit Answer Tries 0/4