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How much oil wells in a given field will ultimately produce is key information in deciding whether to drill more wells. Following are the estimated total amounts of oil recovered from 64 wells in the Devonian Richmond Dolomite area of the Michigan basin, in thousands of barrels.
Take these wells to be a Simple Random Sample of wells in this area.
21.71 53.2 46.4 42.7 50.4 97.7 103.1 51.943.4 69.5 156.5 34.6 37.9 12.9 2.5 31.479.5 26.9 18.5 14.7 32.9 196 24.9 118.282.2 35.1 47.6 54.2 63.1 69.8 57.4 65.656.4 49.4 44.9 34.6 92.2 37.0 58.8 21.336.6 64.9 14.8 17.6 29.1 61.4 38.6 32.512.0 28.3 204.9 44.5 10.3 37.7 33.7 81.112.1 20.1 30.5 7.1 10.1 18.0 3.0 2.0
Construct a 95% confidence interval for the mean amount of oil recovered from all wells in this area using t procedures.
Make a histogram of the data and discuss the shape, center, and spread. A computer-intensive method that gives accurate confidence intervals without assuming any specific shape of the distribution gives a 95% confidence interval of 40.28 to 60.32. How does the t interval that you constructed compare with this interval? Should the t procedures be used with this data?
The sales of Lexus automobiles in the Detroit area follow a Poisson distribution with a mean of 3 per day. What is the probability that for five consecutive days at least one Lexus is sold?
Explain clearly what is meant by a false negative rate of 5% and a false positive rate of 15%. If the population were screened, what proportion would be expected to test negative for metropathy?
What is the event corresponding to the above system failing during one period of operation and what is the event corresponding to the above system functioning properly during one period of operation?
a history professor decides to give a 12-question true-false quiz. she wants to choose the passing grade such that the
Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced.
Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents.
Suggest reasonable values for n and p (binomial) or mu (poisson) for your example. Calculate the mean and standard deviation of the distribution for your example.
Assume that the histogram for Math SAT scores is symmetric and concentrated about 450. Estimate the percent of students who score higher than 650 of the Math SAT.
The following data are daily price quotations of two stocks: Stock A: 12.50, 12.75, 12.50, 13.00, 13.25, 13.00, 13.50, 14.25, 14.00. Is there a correlation between the two stocks? Explain.
Obtain descriptive statistics and graphic displays for these salt-taste indices. Do the indices appear to be normally distributed? Why or Why not? Compute the sample mean for this index, and obtain 95% CIs about the point estimate.
What is overall mean and standard deviation of the test scores? Sketch the distribution and show where you are and where your friend is?
Computed and shown to exceed the critical value for this data. The data is double checked and verified. This shows that car wrecks cause ice cream sales.
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