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#1




median calculation
may be this is silly for alot of you , but if there is repeated readings how we calculate the median , do we use it once or more ??as i know from step 1 we use it once but here in uworld it is different
if you have (18,20,21,22,22) what is the median ??? and why ? 
#2




Quote:
Mode is the most common reoccurring number. so that would be 22. Mean is average. 103/5 = 20.6
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#3




Also.
Dr. wikipedia provides a good explanation. In statistics and probability theory, the median is the numerical value separating the higher half of a data sample, a population, or a probability distribution, from the lower half. The median of a finite list of numbers can be found by arranging all the observations from lowest value to highest value and picking the middle one (e.g., the median of {3, 3, 5, 9, 11} is 5). If there is an even number of observations, then there is no single middle value; the median is then usually defined to be the mean of the two middle values [1] [2] (the median of {3, 5, 7, 9} is (5 + 7) / 2 = 6), which corresponds to interpreting the median as the fully trimmed midrange. The median is of central importance in robust statistics, as it is the most resistant statistic, having a breakdown point of 50%: so long as no more than half the data is contaminated, the median will not give an arbitrarily large result. A median is only defined on ordered onedimensional data, and is independent of any distance metric. A geometric median, on the other hand, is defined in any number of dimensions.
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The above post was thanked by:  
hydrocephalus (04122014) 
#4




Quote:
thank you so much , i had this doubt about repeated values if we use it or not 
#5




a repeated value is just another data point. think of it as 5 different people who provide 5 different scores for the same single test.
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2015 grad , Step 1[X], Step 2CK [X], Step 2 CS [X] , Step 3 [X], MATCHED IM 2015. PGY1 to Infinity. 
#6




Quote:
In that case median will be middle two divided by two 20+22=42 /2 = 21 . 
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