 # Biostatistics

## Interrelationships of quantitative variables: Correlation and Regression

Sometimes, in the experiment, we measure the two continuous characters which are associated with each other. For example, the height of plant and the temperature of the atmosphere. To understand the relationship between two such variables, we need to know how they are related and how the relationship can be …

## Analysis of Variance and F test

We can test the significance of the two sample means by using a t-test. However, in cases where there are more than two samples, it is done by Analysis of Variance (ANOVA). This method is carried out by comparing sample variances using Variance Ratio Test or F test. So at …

## Measures of Dispersion

Range The range consists of a group of knowledge which shows the difference between the highest and lowest values within the data set. So as to seek out the range, it is necessary to first order the data from least to greatest. Then  we have to subtract the smallest value from …

## Organisation and Presentation of Data

There are two main methods of presenting data of a variable character or a variable. A) Tabulation/Tabular Presentation B) Drawing/Graphical Presentation Tabulation Tabulation are devices for presenting data from a mass of statistical data. Preparation of frequency distribution table is that the first requirement. Tables are often simple or complex …

## Measures of Central Value,Symmetrical & Asymmetrical Distributions,Skewness,Kurtosis

Average  Average value of a characteristic is the one central value around which all other observations are dispersed.In any large series, nearly 50% observations lie above while other 50% lie below the central value.It indicates how the values lie near the centre. **Average is the measure of central tendency or …

## Random Sampling

Sampling Measuring a small portion of something and then making a general statement about the whole thing is known as sampling. Sampling is a process of selecting a number of units for a study in such a way that the units represent the larger group from which they are selected. …