Mean or median? Choose the (default) Normal population at the top. What is the centre of this population? Choose Mean and N = 25, and below choose Median and N = 25.

Draw samples and examine the two sampling distributions. Which of these sampling distributions are centred at the population centre (unbiased)? Which statistic would you prefer to use as an estimator of the true population centre—if unknown to you—for this type of population? Explain.