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What are the problems associated with the collection of medical statistics?
Data from many sources (e.g. primary care records, clinical trials, observational studies, etc) are analysed to create medical statistics. These statistics are then collected and evaluated to ultimately improve medical practice.Medical statistics are usually collected by gathering the relevant published articles which contain them. The main problem that can arise from this is that the articles may be selected in a particular way, for example only articles favouring a particular outcome may be selected, which would bias the evaluation of the evidence. Systematic reviews are designed to reduce the chance of this, however they may not eliminate it. Meta-analyses can be conducted to combine the statistics from several sources, but meta-analyses also have their problems.Keep up to date with problems associated with statistics at http://biostatistics-news.blogspot.com/
How many articles in 2 dozens?
1 dozen = 12 articles 2 dozen = (2 times 12) = 24articles
If the cost price of 21 articles is equal to the selling price of 18 articles find the gain or loss percent?
there will be a gain of 16.562 percent.
If Machine X and Y produces 8000 articles in 4 and 8 hours If they work alternatively for 1 hour each X starting first in what time 10000 articles will be produced?
If X produces 8000 articles in 4 hours, it produces (8000/4) = 2000 articles per hour. If Y produces 8000 articles in 8 hours, it produces (8000/8) = 1000 articles per hour. Therefore, the total number of article produced in six hours is: 2000+1000+2000+1000+2000+1000=9000. Machine X (which is on in the seventh hour then works for half an hour to produce 1000 more articles, so the total time is 6.5 hours.
What is the cost of 9 articles and 13p each?
£2.70
