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General trace organic monitoring describes the process in which engineers analyse water samples for various organic materials (e.g. contaminants). The data below record the total organic carbon concentration, X, in 13 water samples collected from a river:
X: 5.1 5.7 7.5 8.1 5.8 6.1 3.1 7.1 9.2 3.7 4.4 6.8 9.8
Estimating the sample Cumulative Distribution Function (CDF) by S(xi) = i/(n + 1), use the Kolmogorov-Smirnov test to examine if these data are consistent with coming from a Normal distribution having mean 7.0 and standard deviation 2.0. Obtain the Normal Equivalent Deviates corresponding to the observed values of X and use these to produce a Q-Q plot. Does your plot indicate that these data are consistent with coming from a Normal distribution?
Car X used k gallons of gas while traveling p miles, and car Y used s gallons of gas while traveling r miles. What was the ratio of the number of miles per gallon for car X to the number of miles per gallon for the car Y?
The samples a group of 100 new fathers and finds that their mean is 64.5. What is the shape of the comparison distribution?
An olympic archer is able to hit bull's-eye 80% of the time. assume each shot is independent of the others. if she shoots 6 arrows, what's the probability of each of these results? She gets at least 4 bull's-eyes?
The mean and variance of the total amount of money that is collected from a car that crosses the bridge are:
The number of customers who have requested a reservation at full fare for this flight in the past always has a normal distribution with mean 40 and standard deviation 10. Determine how many seats should be reserved for customers who pay full fare.
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
The probability that it is a camper with Canadian license plates is 0.09. What is the probability that a camper entering the Luray Caverns has Canadian license plates?
Formulate null and alternative hypothesis to test for no difference between the population mean credit card charges for groceries and the population mean card charges for dining out.
Researcher is interested in testing whether there are differences in mean between population one and population two.
A study by Hewitt Associates showed that 79% of companies offer employees flexible scheduling. Suppose a researcher believes that in accounting firms this figure is lower.
The book has a program on page 153 for this, but the program was written is an unusual way. The subject should be mouse. So how should we dene mouse in the data?
What is the probability that exactly 7 cabinets are defective? What is the probability that there are more than 8 defective file cabinets?
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