Tagged: datascience

Sample Size Calculation and Power Clinical Trials

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 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)=...

How to Perform Tukey HSD Test in R

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...

How to Perform Dunnett’s Test in R

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...

COUNTIF Function in R

COUNTIF Function in R, As we know if we want to count the length of the vector we can make use of the length function. In case you want to count only the number...

Data Science & business analytics

Data Science & business analytics, Both Science Data and Business Science include collecting data, modeling, and understanding the insight data gathering. The difference between this is that Business Science is clear on business-related issues...

How to Create a Covariance Matrix in R

Covariance Matrix in R, Covariance is a measure of the degree to which two variables are linearly associated. We can measure how changes in one variable are associated with another variable. A covariance matrix...

Point Biserial Correlation in R-Quick Guide

Point Biserial correlation in R, What do you understand by biserial correlation? In some situations in which one variable is dichotomous according to some qualitative factor and another variable is numeric according to some...

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