# Category Archives: biostatistics

## 100 multiple-choice questions (MCQs) for biostatistics

1. What is the primary objective of biostatistics? a) To analyze data from clinical trials b) To study biological processes c) To apply statistical methods to biological data d) To develop new medical treatments 2. Which of the following is an example of quantitative data? a) Blood type b) Gender c) Age d) Eye color… Read More »

## Quasi-experimental study

A quasi-experimental study is a research design that shares similarities with experimental research but lacks randomization and/or a control group. In other words, it involves manipulating the independent variable but lacks some of the key elements of a true experimental design, such as randomly assigning participants to different groups or conditions. Quasi-experimental studies are often… Read More »

## Simple Linear Regression

Simple linear regression is a statistical technique used to study the relationship between two continuous variables, where one variable is considered the dependent variable and the other variable is considered the independent variable. The goal of simple linear regression is to develop a linear equation that best describes the relationship between the two variables. The… Read More »

## Confidence Intervals

A confidence interval is a range of values that is used to estimate an unknown population parameter with a certain degree of confidence, based on a sample from that population. It is a statistical tool that helps us to make inferences about the population based on the information we have from the sample. In other… Read More »

## t-test

T-test is a statistical hypothesis test used to determine whether there is a significant difference between the means of two groups of data. It is a common test used in many fields, including medicine, psychology, and social sciences. The t-test compares the means of two groups and calculates a t-value, which is a measure of… Read More »

## Risk Difference

CTSpedia Describes the risk difference with examples. CTSpedia website provides useful tools to clinical and translational researchers. www.ctspedia.org/ Boston University of Public Health A comprehensive lecture note with self assessment question and tips for students. http://sphweb.bumc.bu.edu Point Estimation A PPT on Odds Ratios, Hazard Ratios, Risk Differences, Precision by Elizabeth S. Garrett from series of… Read More »

## Standard Deviation

Standard deviation The standard deviation tells us how spread out the data is from the mean. It is the square root of the variance. Standard Deviation and Variance Mathfun site describes the SD and variance in very simplest way with the example of height of 5 dogs. www.mathsisfun.com/ Robert Niles Robert Niles explains the concept… Read More »

## Kappa test

Kappa test Understanding Interobserver Agreement:The Kappa Statistic Anthony J. Viera, MD; Joanne M. Garrett, PhD Kappa test or Cohen’s kappa is used to measure the inter-observer agreement on categorical scales, such as clinical assessment findings of patients. In this article, the authors describes an interpretation of this  test as well as its limitation. Limitations of kappa… Read More »

## Biostatistics slides

Biochemistry lecture notes are an essential resource for students and researchers in the field of biochemistry. They provide a comprehensive overview of the subject matter and help to reinforce key concepts and principles. In this article, we will explore some of the best resources for biochemistry lecture notes. 1. Purdue Chemistry Purdue Chemistry provides lecture… Read More »