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1. The mean body mass index (BMI) for boys age 12 is 23.6. An investigator wants to test if the BMI is higher in 12-year-old boys living in New York City. How many boys are needed to ensure that a two-sided test of hypothesis has 80% power to detect a difference in BMI of 2 units? Assume that the standard deviation in BMI is 5.7.
2. An investigator wants to estimate caffeine consumption in high school students. How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95% confidence.
3. A crossover trial is planned to evaluate the impact of an educational intervention program to reduce alcohol consumption in patients determined to be at risk for alcohol problems. The plan is to measure alcohol consumption (the number of drinks on a typical drinking day) before the intervention and then again after participants complete the educational intervention program. How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within 2 drinks of the true mean difference? Assume that the standard deviation of the difference in the mean number of drinks is 6.7 drinks.
Which of the following is an example of combining two incomplete proteins to achieve protein complementation?
Mrs. McBride can't consciously recall how frequently she criticizes her children because it would be too anxiety-arousing to do so. Sigmund Freud wuold have suggested that her poor memory illustrates:
Many organizations now have units that monitor a host of magazines and newspapers looking for stories that may have an impact on the organization.
using at least two additional resources wikipedia sources are not permitted write a four to six page paper addressing
In response to the negative perceptions of the police, many departments implemented Community Policing strategies in an attempt to improve community relations and increase community participation in crime control efforts. However, critics feel the co..
Industry or "sector" experts who by their own intelligence and knowledge and using public sources of information deduce and ascertain a company's confidential information and then trade on that information can be said to be acting:
decrease poverty in SIDS, effective policy environment and play a strong regulatory role in developing sustainable tourism policies, utmost benefits from tourism growth
Everyday at 12 noon, Paige faces the same dilemma. The local siren sounds to signal the mid-day and Paige’s 4-year old daughter, Natasha begin to cry. This was not always the case, but a month ago, there was a small kitchen fire at their residence.
What would be the first note you would write down if you were Charlie? Why? What else should be on Charlie's list? Why
What are some of the issues to consider in determining whether the Internet would provide your business with a competitive advantage?
Why might actual revenues and expenditures reported on the schedule of revenues, expenditures, and changes in fund balances - budget and actual differ from those reported on the GAAP-basis statement of revenues, expenditures, and changes in find bala..
Review the claim of consequentialism that actions are right to extent they have beneficial consequences. Explain a condition in which a judge might apply principle that the end justifies the means.
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