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Old 04-28-2014
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Arrow BioStat Question for Today

In a medical class of 147 students, the distribution of scores on a biochemistry final examination has a mean equal to 67, a median equal to 76, a mode equal to 80, a standard deviation equal to 5.5, and a variance equal to 30.25. Three students were unable to take the test on the scheduled date and were given a different form of the exam one week later. Which parameter is most likely to be the least biased estimator of central tendency for this distribution of biochemistry test scores?
(A) Mean
(B) Median
(C) Mode
(D) Standard deviation
(E) Variance

could someone explain this in a simple way??
thanks a lot in advance
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Old 04-28-2014
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is it median? if yes then i can give an explanation as i dont want to sound like a fool :P
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i meant mode sorry
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Correct Answer

Quote:
Originally Posted by doctor drake View Post
i meant mode sorry
no! you where right the first time, is MEDIAN

please do explain, if i could simply state it:
could it be that ALWAYS in a skewed distribution, median will be the one who will determine the central tendency cause is in THE MIDDLE?
let me know if my way of thinking is correct, this question got me confused.
thanks for replying
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Old 04-28-2014
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Quote:
Originally Posted by drpisho View Post
no! you where right the first time, is MEDIAN

please do explain, if i could simply state it:
could it be that ALWAYS in a skewed distribution, median will be the one who will determine the central tendency cause is in THE MIDDLE?
let me know if my way of thinking is correct, this question got me confused.
thanks for replying
whenever is second guess myself i am wrong yes skewed distribution=median best determinant
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drpisho (04-28-2014)
  #6  
Old 04-28-2014
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Quote:
Originally Posted by doctor drake View Post
whenever is second guess myself i am wrong yes skewed distribution=median best determinant
thanks!!
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