Below are the solutions to these exercises on Conducting Power Analysis for Experimental Design. #################### # # # Exercise 1 # # # #################### install.packages(‘pwr’, dependencies = TRUE) ## Error in contrib.url(repos, “source”): trying to use CRAN without setting a mirror require(pwr) ## Loading required package: pwr #################### # # # Exercise 2 # […]

# experimental design

## Power Analysis: Exercises

Proper experimental design can save you a lot of headaches and wasted effort. One experimental design tool is often called a Power Analysis. A Power Analysis lets you determine if your design will have enough power to detect an effect. Statistical power is the probability of detecting a trend, given a trend actually exists. Importantly, […]

## Power Analysis Tutorial

Before starting any experiment, careful planning needs to take place. For instance, how many samples are required for your experiment? This question is important for two reasons. First, an experiment with too few of samples may not be able to determine real differences between, say a control and experimental group. And second, too many samples […]