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Chi-Square Test of Independence A study was done to test the claim that discharging a newborn infant discharged early (less than 30 hours after birth) is related to re-hospitalization of that infant within a week of discharge. The following data was collected related to early discharge and re-hospitalization: Re-hospitalized within 1 week Not re-hospitalized Total Early Discharge (less than 30 hours) 622 3997 4619 Late Discharge (30 - 78 hours) 631 4660 5291 Hint: Instructions for performing this test in STATDISK can be found in the Stat Disk User's Manual under the heading Chi Square Test of Independence (Contingency Tables). Instructions Answers 11. Just looking at the numbers in the table, what is your best guess about whether early discharge is related to re-hospitalization? [Hint: you might compute the difference in percentages between those that were discharged early and those that were not.] 12. Compute a Chi-Square Test of Independence on this data using a 0.05 level of significance. Paste your results here. 13. What is the null and alternative hypothesis for this result? 14. What is the p-value for this result? What does this represent? 15. State your conclusion related to the context of this problem.
odds ratio odds ratio or is sometimes reported instead of relative risk. this normally gives the odds or likelihood of
What is the probability in the sample?
Match the linear correlation coefficient to the scatter diagram.
A typical incoming telephone call to your catalog sales force results in a mean order of $ 28.63 with a standard deviation of $ 13.91. You may assume that orders are received independently of one another.
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What is the approximate percentage of the players that are taller than 65.6 inches?
How would you interpret these results in terms of the likely precision of the sample means as estimators of their respective population means?
Injector pump and injectors tested and found OK
4. A simple random sample of 300 items is selected from a large shipment, and testing reveals that 4% of the sampled items are defective. The supplier claims that no more than 2% of the items in the shipment are defective. Carry out an approp..
What types of tests were used for each of those variables and was the test used a reasonable selection for each of these test?
A business man must travel to five different destinations
Write down the regression equation and state the R-squared value and the standard error and explain what they mean with respect to the data.
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