Griner PF, Mayewski RJ, Mushlin AI, Greenland P (1981) Selection and interpretation of diagnostic tests and procedures.
Gardner IA, Greiner M (2006) Receiver-operating characteristic curves and likelihood ratios: improvements over traditional methods for the evaluation and application of veterinary clinical pathology tests.Altman DG, Machin D, Bryant TN, Gardner MJ (Eds) (2000) Statistics with confidence, 2 nd ed.
2007 expect when the predicitive value is 0 or 100%, in which case a Clopper-Pearson confidence interval is reported. 2000.Ĭonfidence intervals for the predictive values are the standard logit confidence intervals given by Mercaldo et al. Sensitivity, specificity, disease prevalence, positive and negative predictive value as well as accuracy are expressed as percentages.Ĭonfidence intervals for sensitivity, specificity and accuracy are "exact" Clopper-Pearson confidence intervals.Ĭonfidence intervals for the likelihood ratios are calculated using the "Log method" as given on page 109 of Altman et al. = Sensitivity × Prevalence + Specificity × (1 − Prevalence) Accuracy: overall probability that a patient is correctly classified.Negative predictive value: probability that the disease is not present when the test is negative.Positive predictive value: probability that the disease is present when the test is positive.= False negative rate / True negative rate = (1-Sensitivity) / Specificity Negative likelihood ratio: ratio between the probability of a negative test result given the presence of the disease and the probability of a negative test result given the absence of the disease, i.e.= True positive rate / False positive rate = Sensitivity / (1-Specificity)
Positive likelihood ratio: ratio between the probability of a positive test result given the presence of the disease and the probability of a positive test result given the absence of the disease, i.e. Specificity: probability that a test result will be negative when the disease is not present (true negative rate). Sensitivity: probability that a test result will be positive when the disease is present (true positive rate). do you even know who she is?Īs seen on YouTube! The pilot episode of Negative Nancy, remastered! A terrible boss, a terrible waitress, a terrible crime! See where it all began… can you have the perfect day?Įach story features many branching paths: decisions you make can completely change the course of the story!Ĭollect mementos to remind you of all adventures you’ve had with Nancy.(*) These values are dependent on disease prevalence. Who’s going to stop her… you? If you think being fired is enough to escape. It’s that customer, and if she can’t speak to the manager she’s going right to the top. Road trips, wellness retreats, the sweet allure of revenge. What would you do with fifteen minutes of fame? When a famous StreamTuber comes to MegaMart, everything changes. They say the more you remember, the more you’ve lost… but what if you have nothing to lose? Heavily armed customers, unsuited suitors, and a MegaMart under MegaSiege! Forgetting this shift? Forget about it! You’ll be solving crimes, serving customers, making and losing friends-just like real life! if they want to take you on they'll have to get in line!Īll the fun of working retail with none of the pay. Annoying StreamTubers, delusional bosses, and angry customers. You work a terrible job at Megamart with your best friend, but most of the time that’s the least of your problems. You are Nancy, a retail clerk who can only say “no!”. An interactive sitcom where you can only say “no” (or nothing at all). Negative Nancy is a choose your “no” adventure for people who have had enough.
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