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HRC surveyed a random sample fo 74 Twin Cities construction companies to find information on the costs of their health care plans. One of the item being traced is the annual deductible that employees must pay. The Dept of Labor reports that historically the mean deducible per employee is $502 which Stand Dev of $120. What is the change HRC finds a sample mean between $477 and $527? Calculate the likelihood that the sample mean is between $492 and $512. And what is the probability the sample mean is greater than $550?
a simple random sample of 49 8th graders at a large suburban middle school indicated that 82 of them are involved with
medical guidelines recommend that patients who suffer cardiac arrest while hospitalized should receive defibrillation
suppose iq score were obtained from a randomnly selected siblings.for such 20 pairs of people the linear corelation is
Management of a company is considering adopting a bonus system to increases production. One suggestion is to pay a bonus on the highest 5 percent of production based on past experience.
Is there sufficient data to determine that these student data reflect population data? Determine using alpha .05 as critical value.
an airline has a policy of booking as many as 23 persons on an airplane that can seat only 22. past studies have
Is it sensible to conclude that mean weekly salary of school teachers is lower at .05 level of significance? Explain why?
a firm is accustomed to training operators who do certain tasks on a production line. those operators who attend the
The following time series data represent the yearly amounts spent on advertising (in millions of dollars) by a large toy company:
Under new grading scale, how many students will have A's, B's, C's, D's and F's? Do you beleive the instructor must grade on a curve? Explain why or why not?
One of the criteria in their evaluation was the baggage capacity of the boat, evaluated using a 4-point rating scale from 1 to 4.
Compute a confidence interval for the difference in population means and assume x is normally distributed in the populations and the variances of the populations are approximately equal.
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