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Over the last year the absentee rate at a large corporation averaged 8.2 days absent with a standard deviation of 6 days. One department with 40 employees had an absentee rate of 12 days per employee. During an investigation the department head argued as follows: "If you took 40 employees at random from the corporation, there is a pretty good chance the average number of days absent would be 12 or more. That's what happened to us-chance variation." Is this a good defense? Justify your answer.
How could the engineer increase the accuracy of the interval without changing the level of confidence?
Determine the estimated population mean?
Utilize this information to construct a probability table, and then calculate each of the given probabilities:P (female and domestic car).
Many people attend work and produce little or nothing of value that is why they are terminated.
Steps in hypothesis test procedure - conducting a hypothesis test for some general statistic, ? say.
Consider the following portion of an electric circuit with three relays. Current will flow from point A to point B if there is at least one closed path when the relays are activated. The relays may malfunction and not close when activated.
We are 95% confident that the proportion of non sell-able items for Whole Fruits is anywhere between 6.4% and 15.6% HIGHER than the proportion of non sell-able items for Green Grocer.
Florida State University administers a mathematics placement test to students where they 1st enter the university.
Which of the following statements is not true of the null hypothesis? A) It is your theory B) It is what you would expect by chance alone C) Assumes things to be equal D) None of the above
They also know that the distribution of loss from fire has a skewed distribution; many have $0.00 losses and a few have large losses.
A researcher wants to estimate the average time (in minutes) spent in a car daily. This will be done by randomly surveying 300 individuals and calculating the sample mean.
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
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