Python Statistics for Data Science Course- Part 2
Variable and its types What are the different types of variables? Confounding variables are those that are not available in the dataset but could have a hidden effect on the results. In general people who sleep more have better memory and for example we have a data sample with two columns Sleep hours and memory and we are asked to predict, there could be a medical history data that is not available in the data set but could have an impact on the out come. A patient, who has a medical issue related to his memory will have bad memory though he sleeps longer. Here medical condition is a confounding variable that is not available in the data set but could have impact on the out come. What is a Placebo in a experiment? A placebo is a non active item(pill) looks same as a active item. Ex: In a memory test, to differentiate people with more sleep and less sleep, a pill is given to every participant and some pills are placebos which look like a sleeping pill but does not ...
