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Twenty percent of all telephones of a certain type are submitted for service while under warranty. Of these, 60% can be repaired, whereas the other 40% must be replaced with new units. If a company purchases ten of these telephones, what is the probability that exactly two will end up being replaced under warranty?
The diameter of stabilizing O-Rings washers manaufactured at a large factory is expected to be normally distributed with a mean of 1.30 inches and a standard deviation of 0.04 inches.
Calculate the test statistic, and interpret the result, calculate the p-value, and interpret the result and determine the rejection and non-rejection regions.
carbon dioxide gas enters a well-insulated diffuser at 20 psia 500 r with a velocity of 800 fts through a flow area of
What is a p-value in testing hypothesis? How does this p-value help us to decide to/not to reject a Null hypothesis?
A sample standard deviation = 5.60 hours, find the upper limit of a 98% confidence interval estimate of the true population mean life.
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
To avoid losing money, the top 5% (the heaviest 5%) is labeled overweight. A) What proportion of boxes is underweight?
In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents
In a recent year, the FCC reported that the mean wait for repairs for AT&T customers was 25.3 hours. In an effort to improve this service, suppose that a new repair service process was developed.
The Restaurants McBurger says that the waiting time for customers is 3 minutes with a standard deviation of population 1 minute. The quality control department found in a sample of 50 clients that the average waiting time was 2.75 minutes.
the amount of distilled water dispensed by a certain machine is normally distributed with mean value 64oz and standard
the number of o-ring failures for the first 23 flights of the us space shuttle challenger were0 1 0 na 0 0 0 0 0 1 1 1
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