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Problem 1. Confidence Intervals: t tests. Digitized Documents, Inc., is a small but rapidly growing firm in the digitized document translation business. The company reads architectural and engineering drawings into a scanning device that translates graphic information into a digitalized format that can be manipulated on a personal computer or work station. During recent weeks, the company has added a total of five new clerical and secretarial personnel to help answer customer questions and process orders. Data on the number of years of work experience for these five new workers is as follows:
5 4 3 4.5 3
A. Compute the mean, median and mode measures of central tendency for the number of years of work experience. Which measure does the best job of describing central tendency for this variable? The mean is 3.9 years per worker. The median is 4. The mode is 3. Each measure of central tendency offers a highly similar view of the typical observation.
B. Compute the sample range, variance and standard deviation for this data series, and the 95% confidence interval within which you would expect to find the population's true mean. The range for these workers if from 3 to 5 years experience. The sample variance is 0.8 (years squared) with a standard deviation 0.894427 years.
If you draw two balls without replacing the first one, what is the possibility that one ball is red and the other is white.
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Suppose that monthly rental rates for unfurnished one-bedroom apartment in Ann Arbor, Michigan, are approximately normal in distribution, with a mean of $750 and a standard deviation of $150.
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
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Different approaches for creating systems simulation models include?
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Monte Carlo sampling makes the assumption that all parameters of an alternative are: A. Independent B. Dependent C. Equal to 1.0 D. Probability distribution
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In the biology class the mean score was 79 with standard deviation 5.
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
If we know that the length of time it takes a college student to find a parking spot in library parking lot follows a normal distribution with mean of 3.5 minutes and a standard deviation of 1 minute, determine the probability that a randomly sele..
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