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The Quick Change Oil Company has a number of outlets. The numbers of oil changes at the Oak Street outlet in the past 20 days are:
65 98 55 62 7959 51 90 72 5670 62 66 80 9479 63 73 71 85
Organize the data into a frequency distribution and include the relative frequency distribution.
A machine that manufactures automobile parts is estimated to produce defective parts 5% of the time. If this estimate is correct, and 9 parts produced by this machine are randomly selected
What is the probability that the total number of customers who enter the supermarket in one day is greater than 11700?
What are the expected value and standard deviation of the number of small aircraft that arrive during a 90-min period?
Describe the distribution of sample means (shape, expected value, and standard error) for samples of n=36 selected from a population with a mean of µ=100 and a standard deviation of σ=12.
Management plans to sample 150 packages per week. What is the appropriate control chart?
What results in your departments seem to be correlated or related to other activities? How could you verify this? Create a null and alternate hypothesis for one of these issues. What are the managerial implications of a correlation between these v..
If there is one-year warranty on the equipment, what proportion of the customers will actually make a valid warranty claim?
Describe the purpose of the link function of a GLM. What is the identity link? Explain why it is not often used with binomial and Poisson responses.
study where a drug was given to 10 patients and a placebo to another group of 10 patients to determine if the drug has an effect on a patient's illness?
A new company is manufacturing light bulbs. The CEO claims that the average light bulb lasts 260 days. A researcher selects 25 bulbs for testing. The sample bulbs last an average of 250 days with a standard deviation of 20 days.
What is the probability that both defective lights will be found within three trials?
A random sample of 64 services is selected. What is the probability that the sample of 64 will have a mean service time greater than 114 minutes.
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