Category: R

We want to determine the mean and standard deviation of ungrouped data in practically all circumstances. However, how can you do that with grouped data? Grouped Data Mean and Standard Deviation Let’s look at...

Dot Plots in R, Strip charts are often known as one-dimensional scatter plots or dot plots. When the sample size is small, strip charts are commonly employed. It’s a different type of plot than...

Names Function in R, In this post, we’ll look at how to use the names () function to give vectors and lists names. Syntax Basic R Syntax of names function is names (x) Example...

Chi-Square for Independence, It is simple to evaluate using the chi-square test or Fisher exact test when we have two categorical variables. Consider the case when we have three categorical variables and wish to...

Sample Size Calculation and Power, One of the most important stages in the planning of clinical trials is the estimation of sample size. This post discusses the significance of sample size calculation and power,...

Weibull Distribution in R, Weibull Distribution was discovered by Swedish physicist Wallodi Weibull in 1939. A continuous random variable X is said to follow Weibull distribution if its probability density function fx(x; α, β)=...

Tukey HSD Test in R, When there are three or more independent groups, we apply a one-way ANOVA to see if there is a significant difference. The p-value for one-way ANOVA is less than...

Dunnett’s test in R, After the ANOVA test has been completed the next step is to determine which group means are significantly different from one another. Different types of post hoc tests are available...

How to Remove Duplicates in R, when we are dealing with data frames one of the common tasks is the removal of duplicate rows in R. This can handle while using different functions in...

Calculate Geometric Mean in R, Geometric mean is the nth root of the product of n values of a set of observations. Geometric can be expressed as GM=(x1, x2, x3, ……, xn)1/n The advantage...