Biostatistics is defined as the application of statistical methods to which field?

What is the difference between a POPULATION and a SAMPLE in statistics?

Variables can be classified as qualitative or quantitative. Which classification does 'blood group (A, B, AB, O)' belong to?

Mean, Median, and Mode are measures of central tendency. Given data: 3, 5, 5, 7, 9 — what are the mean, median, and mode?

The MEDIAN of the following data set: 12, 18, 24, 6, 30, 9, 15 is:

Standard Deviation (SD) measures which property of data?

Calculate the variance for the data: 2, 4, 4, 4, 5, 5, 7, 9. The mean is 5.

The Coefficient of Variation (CV%) is used for what purpose and how is it calculated?

The RANGE and INTERQUARTILE RANGE (IQR) are both measures of spread. What is the IQR and why is it preferred over the range?

In a box plot, which value is represented by the line INSIDE the box?

The NORMAL DISTRIBUTION (Gaussian distribution) has which properties?

What is SKEWNESS and how does it affect the relationship between mean, median, and mode?

The CENTRAL LIMIT THEOREM (CLT) states that:

Standard Error of Mean (SEM) vs Standard Deviation (SD) — what does each measure?

What is a Z-score and how is it calculated? If a patient's serum sodium is 155 mEq/L, population mean is 140 mEq/L and SD is 5 mEq/L, what is the Z-score?

What is a CONFIDENCE INTERVAL (CI) and what does a '95% CI' specifically mean?

Probability basics: What is the probability of rolling a 6 on a fair die?

What is the BINOMIAL DISTRIBUTION and when is it used?

The POISSON DISTRIBUTION models which type of events?

The t-distribution differs from the normal distribution in which way?

What is the CHI-SQUARE (χ²) distribution and what is it used for?

In a 2×2 contingency table, what are SENSITIVITY and SPECIFICITY?

Calculate PPV (Positive Predictive Value): A test has Sensitivity = 90%, Specificity = 95%. Prevalence = 10% (100 per 1000 patients). Using a 1000-patient hypothetical table:

What is the RECEIVER OPERATING CHARACTERISTIC (ROC) curve and what does the Area Under the Curve (AUC) measure?

What is LIKELIHOOD RATIO (LR) and how does it help interpret diagnostic test results?

NULL HYPOTHESIS (H₀) and ALTERNATIVE HYPOTHESIS (H₁) in hypothesis testing — what do they represent?

What is the p-VALUE and how should it be correctly interpreted?

Type I Error (α) and Type II Error (β) — what do they mean?

SAMPLE SIZE CALCULATION — which factors determine the required sample size for a study?

What is CORRELATION and how is Pearson's correlation coefficient (r) interpreted?

Simple LINEAR REGRESSION: given Y = 2X + 5, what does each component represent?

What is MULTIPLE REGRESSION and what is it used for?

ANOVA (Analysis of Variance) is used when:

When to use PARAMETRIC vs NON-PARAMETRIC tests — what is the decision criterion?

What is SURVIVAL ANALYSIS and what does the KAPLAN-MEIER curve show?

What is LOGISTIC REGRESSION and when is it used?

What are ODDS and ODDS RATIO (OR) and how do they differ from RISK and RISK RATIO (RR)?

What is KAPPA STATISTIC (Cohen's Kappa) and what does it measure?

What is the INCIDENCE and PREVALENCE of a disease and how do they relate?

What is the NUMBER NEEDED TO TREAT (NNT) and how is it calculated?

What is META-ANALYSIS and what does the FOREST PLOT show?

In genetics, what is the CHI-SQUARE TEST for goodness-of-fit used for?

BAYESIAN statistics vs FREQUENTIST statistics — what is the fundamental difference?

What is BIAS in statistical studies and what are the main types?

What is RANDOMIZATION in clinical trials and why is it important?

What is the INTRACLASS CORRELATION COEFFICIENT (ICC) used for?

Bland-Altman plot is used to assess:

What are PERCENTILES and how are they used in clinical medicine?

REFERENCE INTERVAL (reference range) in clinical laboratory — how is it determined and what does it mean?

What is the difference between ACCURACY and PRECISION in laboratory measurements?