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Anti-Quackery Ring

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This ring is for sites that combat & debunk health-related frauds, myths, fads, and fallacies, and are more interested in real, objective, scientific proof, than in the speculative, subjective, and unproven theories and anecdotes of so-Called "Alternative" Medicine (sCAM)....................................... WARNING: Ring members have no control over advertisements appearing on this page, and neither endorse nor recommend their subject matter.
 

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Testing screening tests - 12/01/2012
_person_has_the_condition)._That's_read_as_"the_probability_that_the_test_comes_out_positive_given_the_person_has_the_condition."_The_vertical_bar_is_read_as_"given."_Specificity_is_the_rate/frequency/probability_a_medical_screening_test_will_result_in_a_negative_finding_given_that_the_person_being_tested_does_not_have_the_condition_or_disease_which_the_test_is_for. _In_other_words,_specificity_is_P(test_is_negative_

How reliable are home pregnancy test (HPT) kits? Given 100 who've just conceived, 75 of them will test positive. And given 100 who aren't pregnant, 75 will correctly test negative . Assume the chances of conception when coitus is performed at some randomly chosen day of the month is 5% . If the HPT result comes out positive should the woman panic and faint if it's an unwanted pregnancy? Or if she's been trying to be with child for years, should she immediately broadcast the news on Facebook, Twitter, and email every friend and kin she has? Before finding out the answer, let's introduce some important terms. The base rate is the prevalence rate or frequency of a disease, condition or phenomenon in the population.  Sensitivity is the rate/frequency/probability a medical screening test will result in a positive finding given that the person being tested has the condition or disease which the test is for. In probability notation sensitivity can be denoted as P(test is positive

Testing screening tests



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