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Give an example of a research design that would require an independent samples t test and one that would require a dependent samples t test. And explain what they mean and why they are independent or dependent samples.
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300.00?
Determine the typical seasonal patterns for sales using the ratio-to-moving-average method. Project the sales for 2004, and then seasonally adjust each quarter.
Duplicate readings, using two separate instruments, were obtained on ten samples. What is the tabular value of the statistic used to determine the significance of the mean difference at the .05 level of probability?
Under the assumption that co payment amounts are normally distributed, find a 99% confidence interval for the mean amount in dollars.
The number of defective components produced by a certain process in one day has a Poisson distribution with mean 20. Each defective component has probability 0.6 of being repairable.
Can the company claim that they are faster than the average utility?
Using the .05 level of significance: a) Is there a difference among types of gasoline? b) Is there a difference in the cars?
He asks you to develop a proposal for the study and submit it to him. Develop the management-research question hierarchy that will help you to develop a specific proposal.
What is the probability that the total weight of eight people exceeds 1300 pounds? 1500 pounds? (Assume that the probability distribution is approximately normal).
Assume that a simple random sample is selected from a normally distributed population, use eith the P-value method or the tradiitonal method of testing hypotheses.
What is the technical definition of alpha? When might a "high level of proof" be required in business? Why does a "high level of proof" mean a small value of alpha?
Out of the total nuts manufactured by a company 0.5 percent became defective. The nuts are supplied in packets of 40. Find out the probability number of packets containing.
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