Exercise

Summarizing the zombie drug experiment

The point of working with samples from a probability distribution is that it makes it easy to calculate new measures of interest. The following tasks are about doing just this!

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A point estimate is a single number used to summarize what's known about a parameter of interest. It can be seen as a "best guess" of the value of the parameter. A commonly used point estimate is the median of the posterior. It's the midpoint of the distribution, and it's equally probable for the parameter value to be larger than the median as it is to be smaller than it.

Calculate the median of posterior using the median() function built into R.