Exercise

But how smart will the next zombie be?

So we have an idea about what the mean zombie IQ is but what range of zombie IQs should we expect? And how likely is it that the next zombie you encounter is, at least, moderately intelligent?

Instructions 1/3

XP

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pars_sample is the data frame you worked with last exercise, and the code to the right simulates from a normal distribution incorporating all the uncertainty in the posterior estimates of the mean mu and standard deviation sigma.

Take a look at the resulting probability distribution pred_iq using hist().