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Zip Games purchases blank DVD disks onto which it copies its software for sale through its mail order operation. A disk costs Zip $.20. Processing an order for more disks cost $15. Zip uses 60000 disks annually, and the company has a 25% cost of capital.
a. Find the optimal order quantity.
b. How many orders are placed annually?
c. How frequently will orders be placed?
Complete the test at the 5% level of significance.
There're several advantages of using a paired t-test. Since the same subjects are being tested in each of the varying conditions, those subjects serve as their own control.
At the 0.01 level of significance, is there evidence to support the professor's claim?
Suppose n progeny are to be examined, and let P^ be the sample proportion of purple-owered plants. It might happen, by chance, P^ that would be closer to 1/2 than to 9/16. Find the probability that this misleading event would occur if:
Determine equation in point-intercept form for line that goes through points (8,-1) and (4,3).
What are some real life examples of the use of Chi-Square tests using contingency tables? Why is a test, which is testing significant differences among means called Analysis of Variance?
If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?
Describe a specific application of statistics that either has a direct effect on you or your life.
What should the cut-off score be for the interviews? (Round to nearest whole number).
What is the relationship between the sign of the correlation coefficient and the sign of the slope of the regression line?
The quality control department of Widgets Manufacturing needs your help. They can't decide which significance level is appropriate for testing the claim that fewer than 50% of widgets from a production run are defective.
a) Compute a 95% Confidence Interval for the true population proportion of successes. b) Based on this analysis can you conclude that the new system meets the requirement? Explain your conclusion.
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