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Pprobability of defective light bulb in box of 20 is 0.05 and inspection rules if one is defective, one more box is tested, and if that passes, all bulbs made that day will pass. Find probability that first box fails and second box passes.
Hits on a personal web site occur quite infrequently. They occur randomly and independently with an average of five per week.
Create the indicated confidence interval for population mean using (a) t-distribution. (b) If you had incorrectly used normal distribution, which interval would be wider?
Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood.
Carry your intermediate computations to at least four decimal places. Round your answer to at least two decimal places.
Multiple choice questions based on multiple regression - Find the coefficient of determination for the above model
A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hours.
Determine sample size requirements. When the results are available you would like your margin of error to be plus or minus 5% for the satisfaction measure and plus or minus $1.50 for the spending value.
Use traditional hypothesis test approach. Draw a graph showing the test statistic and critical values. Assume the population has a distribution that is approximately normal and that the sample is a simple random sample.
Evaluated that there is a 95% probability of only slight losses of around $1 million. Using decision tree analysis, determined whether bank must install new power generator.
To find the necessary sample size to achieve the given level of accuracy of prediction.
The difference between a random variable and a probability distribution is: A. A random variable does not include the probability of an event. B. A random variable can only assume whole numbers
A pharmaceutical company has developed a screening test for a rare disease that afflicted 2% of the population. Unfortunately, the reliability of this test is only 80%, which means that 20% of the tested will get a false positive.
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