Useful tips for everyday
What is control in AB testing? In such experiments, the control group represents the group of subjects that are set aside and do not receive…
How do you calculate quarterly averages? QAB is the average of the all the closing day balance of a bank account in a given quarter.…
Can fixed effect be continuous variable? First you CANNOT treat a continuous variable as a random effect. So if you are putting area or temperature…
What is a time series process? Time series refers to a sequence of observations following each other in time, where adjacent observations are correlated. This…
Does Poisson distribution include zero? It is the conditional probability distribution of a Poisson-distributed random variable, given that the value of the random variable is…
Can confidence be normally distributed? Calculating the confidence interval is a common procedure in data analysis and is readily obtained from normally distributed populations with…
Are cluster headaches disease? Cluster headache is a primary headache disorder and the most common of the group of headache disorders called trigeminal autonomic cephalalgias.…
How do you calculate the expected value of a random? For most simple events, you’ll use either the Expected Value formula of a Binomial Random…
How is Mdes calculated? The MDES formula that mdesapp uses is the following: MDES=MJ−k√ρ(1−R22)P(1−P)J+(1−ρ)(1−R21)P(1−P)nJ. where: MDES is the minimum detectable effect size. MJ−k is the…
Why do you have to drop a dummy variable? By dropping a dummy variable column, we can avoid this trap. This example shows two categories,…