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If light bulbs failure times are identically and independently distributed, what shape would you expect for the hazard function of the light bulbs? Draw a picture and explain. It has been suggested that after the rst headlight in an automobile fails, both of the headlights should be replaced. Assume that the failure record makes known whether the replaced bulb is on the left or on the right of the car. Explain how you would analyze the available data to see if this is a good idea or not.
To test the hypothesis that 48% of PC users have never used a Mac, the analyst took a sample of 50 PC customers drawn at random and found that 22 of them had never used a Mac.
A realtor took a random sample of records of sales of homes from the files maintained by the Albuquerque Board of Realtors.
Suppose normality, determine a 90% confidence interval for population variance.
Test the claim that the actual amount of coke exceeds 12 ounces. (Note: You can use the value of $s$ as the value of $sigma$ for your hypothesis test).
Determine the least squares estimators γ and δ for this second model associated to corresponding LS estimators α and β of first model?
If you buy a box of Wisk, the probability of getting a scoop is 97%. If you buy 9 boxes over the next several months, what is the probability of missing two scoops?
In the past few years out sourcing over seas has become more frequently used than before by U.S. companies. However, out souring is not with out problems. A recent survey indicates that 20% of the companies that outsource over seas use consultant.
A firm will promote two employees out of a group of six men and three women. list the chances of this experiment if there is particular concern about gender equity.
Within each of your current careers/ jobs, there are sets of data that can be analyzed. For example, a teacher can use a set of test scores, a dietician can analyze a set of patient weights and correlate them to incidences of diabetes, and a sales..
A small town has a population of 20,000 people. Among these 1,000 regularly visit a popular local bar. A sample of 100 people who visit the bar is surveyed for their annual expenditures in the bar.
Implement your model on a spreadsheet and find the optimal solution using Solver.
Using the sample obtained, draw a histogram and calculate mean and variance for 1000 sampled values for random variable Y = X2.
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