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The Public Interest Research Group (PIRG) surveyed 197 credit reports and concluded that one in four contained serious errors. However, the survey's results were called into question: "Besides objecting to the way the survey was conducted, with PIRG surveying its own members, Norm Magnuson of the Consumer Data Industry Association protested that the group ‘unilaterally decided what is a serious error' in presenting its findings."3 Is Magnuson suggesting there is bias because the individuals are not representative of the larger population, or bias in the assessment of variables' values, or both, or neither?
Are you likely to be able to pass by guessing on every question? Explain.- Suppose, after studying for a while, you believe you have raised your chances of getting each question right to 70%. How likely are you to pass now?
one article reports that in a sample of 355 calves less than 4 days old 106 had lesions on their bronchial lymph nodes
Two cards are drawn without replacement from a wellshuffled deck of 52 playing cards.
at ajax spring water a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. the filling process
When writing about the probability that it will rain in Boston on July 4 of next year, a newspaper reporter states that the probability is ½, because either it will rain or it will not.
the table below shows the number and types of cars competing in a sports car rally.stick gautomatic htotalamerican
The figures show the number of Iraq casualties through October 2009 and the population of some hometowns .
An efficiency expert wants to determine whether the time an assembly worker requires to perform a standard task might be related to (1) the number of years on the job and (2) the score on a pre-employment aptitude test. The following data have bee..
a. What is meant by the trend component of a time series? How is a linear trend different from a nonlinear trend? b. Determine the actual percentage growth in the median selling price between the base year and year 10.
hypothesis tests are proposed. for each hypothesis test. a identify the variable bidentify the two populations
The Watts New Lightbulb Corporation ships large consignments of lightbulbs to big industrial users. When the production process is functioning correctly, which is 90% of the time, 10% of all bulbs produced are defective.
Assuming the distribution of the salaries is normal, what is the probability that the average for this sample is between $36,000 and $42,000?
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