Biostatistics — Flashcards

Flashcard 191: Measurements on the kelvin scale or pulse represent _____ scale data

Answer: ratio

Flashcard 192: The _____ is a measure of variability, based on dividing a data set into quartiles

Answer: interquartile range (IQR)

Flashcard 193: Method for comparison of a new test with an available gold standard test (for quantitative data) is the _____ method

Answer: Bland-Altman plot

Extra: The **Bland-Altman plot** is used to assess the **agreement** between two methods of measurement. Correlation (e.g., Pearson's r) measures the strength of a linear relationship, but not agreement (two methods can be perfectly correlated but give consistently different results).

Flashcard 194: _____ t-test is used to compare two groups of patients for a quantitative variable

Answer: Unpaired/student

Flashcard 195: In a negatively skewed distribution, Mean _____ Median _____ Mode

Answer: <; <

Flashcard 196: _____ analysis is done to include the dropouts of the trial in RCT

Answer: Intention-to-treat (ITT)