Useful tips for everyday
How do you plot a 3D graph in origin? To create a 3D graph from matrix or worksheet data, you select the data, and click…
Are forecasts using past data? Forecasting is a technique that uses historical data as inputs to make informed estimates that are predictive in determining the…
How to do a time series analysis in R? Time Series Analysis in R. Time Series in R is used to see how an object…
What is standard deviation in control chart? A standard deviation control chart monitors process variation, as measured by the standard deviation of observations, through subgroups…
Why do we say that if coefficient of correlation between two variables is 0 then variables need not to be independent? It means there is…
How does CI relate to p value? The p-value relates to a test against the null hypothesis, usually that the parameter value is zero (no…
Why is sigma algebra used in probability? Sigma algebra is necessary in order for us to be able to consider subsets of the real numbers…
Which is the best definition of distance correlation? Distance correlation. In statistics and in probability theory, distance correlation or distance covariance is a measure of…
What increases the power of a statistical test? β = probability of committing a Type II Error. The power of a test can be increased…
What is the probability that a card draw at random from a standard 52 card deck is either a face or a spade? Hence for…