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You work in the leasing office of GE capital and wish to predict the average mileage driven of your leased cars within a margin of error of 100 miles (you need this for your company's financial disclosures). Suppose your average customer drives 10,000 miles a year, and your guess for the standard deviation is about 500 miles. How big of a sample size do you need to generate a 95% confidence interval with a mean of 10,000 miles a year with a margin of error of 100 miles.
determine if the demand and/or supply function is exactly identified, overidentified, or underidentified and give a graphical interpretation of your answer to part a.
In an experiment to study the way in which different anesthetics affect plasma epinephrine concentration, ten dogs were selected and concentration was measured while they were under the influence of the anesthetics isoflurane, halothane.
In as sample of 855 bartenders, 48% report hearing complaints from patrons about their jobs. If the maximum error of estimate for the proportion of bartenders hearing job complaints is 4.4 percentage points, what is the degree of confidence used?
A manufacturer of "low precision" 10 mm diameter ball bearings periodically takes samples and measures them to con?rm that the manu- facturing process is still on target. A random sample of 20 ball bearings resulted in diameter measurements with a..
The 10th, 20th, 30th, 40th, 50th, 60th, 70th, 80th, 90th, and 100th percentiles for X are called its deciles.
In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of them liked the brand Coke. Of all the Diet soda drinkers 40% liked Coke.
At least half the patients are under 15 years old? First, explain how this can be modeled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20%.
What is the probability that each of the 30 students will get a computer in working condition?- find out what the increase or decrease should be for each of the three alternatives.
Lots with a mean such that 8% of the product is nonconforming should be accepted 7% of the time. Find the parameters of a variable sampling plan and describe its operation.
Ages of Billionaires Predict the shape of the distribution of the ages of 20 billionaires. A typical value is about 54 years, but there is an outlier.
Three areas of southern California are prime candidates for forest fires each dry season. You believe (based on historical evidence) that each of these areas, independently of the others, has a 30% chance of having a major forest fire in the next ..
Construct a 90 percent confidence interval for the true mean weight. What sample size would be necessary to estimate the true weight with an error of } 0.03 grams with 90 percent confidence?
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