Biostatistics — Flashcards

Flashcard 101: Formula for Negative Predictive Value (NPV)

Answer: NPV = True Negatives / (True Negatives + False Negatives) Alternatively: d / (c + d)

Extra: Negative Predictive Value (NPV) is the probability that a person with a negative test result is truly free of the disease.

Flashcard 102: In any sampling distribution, → _____includes 68% of the observations → _____ includes 95% of the observations (95% confidence interval) →_____ includes 99% of the observations (99% confidence interval)

Answer: \(Mean \pm1SE \) 

Extra: y

Flashcard 103: type I error[alpha] means _____

Answer: when a true null hypothesis is rejected

Extra: 

Flashcard 104: _____ was first to publish a study in field of demography

Answer: John graunt

Extra: 

Flashcard 105: standard deviation formula is

Answer: root mean squared deviation take whole root n-1 if <30

Extra: 

Flashcard 106: c65872b736324b578b20a22eef5c027a-ao-4

Answer: tests of significance

Extra: 

Flashcard 107: A _____ is a type of graph used to compare two or more sets of qualitative data side-by-side.

Answer: multiple bar chart

Flashcard 108: World Population Day is on _____

Answer: 11th July

Flashcard 109: there is registration of _____ in civil registration system(CRS)

Answer: death and birth

Extra: 

Flashcard 110: Type II error (β) occurs when a _____

Answer: false null hypothesis is accepted

Extra: Type I error (α): Rejecting a true null hypothesis (False Positive). Type II error (β): Failing to reject/accepting a false null hypothesis (False Negative).