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An auto manufacturer advertises that "90% of the cars we've ever made are still on the road." Assuming this is literally true, how can it be explained? What facts/statistics would you need to know to expose this misleading claim?
Statistics and Probability, Statistics
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A random sample of 87 eighth grade? students' scores on a national mathematics assessment test has a mean score of 278. This test result prompts a state school administrator to declare that the mean score for the? state' ...
The probability of a potential employee passing a training course is 86%. If you selected 15 potential employees and gave them the training course, what is the probability that more than 12 will pass the test?
A doctor wants to predict the birth weight of a newborn baby (measured in grams) based on the gestational age (measured in weeks) at the time of birth. The doctor uses 11 data points, with births ranging from 29 weeks to ...
Determine the minimum sample size required when you want to be 98% confident that the sample mean is within two units of the population mean. Assume a standard deviation of 4.82 in a normally distributed population.
Suppose the timing device used in the men's race failed to activate at the start of the race and instead began to record the times seconds into the race. Consider how the competitors' times would be affected. Would the s ...
In the Health ABC Study, 522 subjects owned a pet and 1968 subjects did not. Among the pet owners, there were 297 women; 961 of the non-pet owners were women. Find the proportion of pet owners who were women. Do the same ...
David Barnes and his fiancée Valerie Shah are visiting Hawaii. There are 38 guests registered for orientation. It is announced that 20 randomly selected registered guests will receive a free lesson of the Tahitian dance. ...
The accompanying table presents the number of individuals by smoking and disease status. What are the odds that a smoker will get Disease A? That a nonsmoker will get disease A? What is the odds ration? Disease A Smokin ...
1) Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at an archaeological site. At one excavation, a sample of 165 potsherds indicated that 74 were of the three- ...
Problem: Arrival of vehicles at New Jersey Turnpike toll booth on Saturdays at dawn is modeled as a Poisson Arrival process with a rate of 1.21 vehicles per minute. Let X be a random variable that records the number of a ...
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