Statistics with R and SQL

Normal approximation to binomial distribution using T-SQL and R

In the previous post I demonstrated the use of binomial formula to calculate probabilities of events occurring in certain situations. In this post am going to explore the same situation with a bigger sample set. Let us assume, for example, that instead of 7 smokers we had 100 smokers. We want to know what are… Continue reading Normal approximation to binomial distribution using T-SQL and R

DBA · Statistics with R and SQL

Sampling Distribution and Central Limit Theorem

In this post am going to explain (in highly simplified terms) two very important statistical concepts – the sampling distribution and central limit  theorem. The sampling distribution is the distribution of means collected from random samples taken from a population. So, for example, if i have a population of life expectancies around the globe. I draw… Continue reading Sampling Distribution and Central Limit Theorem