Want a sample size of about 60 30 controls and 30 cases at
Want a sample size of about 60 (30 controls and 30 cases). At 5% significance and 80% power.How do i determine the standard deviation and mean difference.And how do i arrive at the 60? my study design is case-control.
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A husband and wife make their decisions independently of each other, and then they compare their decisions. If they agree, the decision is made; if they do not agree, then further consideration is necessary before a decision is reached.
You work for a division of a textbook publisher that manages the company's economics textbooks. Senior managers have instructed you to find a way to reduce your division's total cost by 30 percent.
A -6.00 µC charge is moving with a speed of 8.20 104 m/s parallel to a very long, straight wire, Find the magnitude and direction of the force on the charge.
The Elixer Drug Company produces a drug from two ingredients.
A doctor knows from experience that 20% of the patients to whom he gives a high blood pressure drug will have undesirable side effects. Assume the doctor gives that drug to ten of his patients
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The drum of the photocopying machine in the problem above has a length of 48 cm and a diameter of 9 cm. What is the total charge on the drum
If you buy a new car the entire purchase is counted as consumption in the year in which you make the transaction. Explain briefly why this is in some sense an 'error' in national income accounting.
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