I'm not sure if I'm doing this correctly. Please help.

I know I need the mean and the standard deviation. I entered the numbers into StatCrunch to get those, but I'm not sure if they are correct.

Mean= 66.363636

Stand. Dev= 10.902043.

I'm lost on what to do next.

A random experiment involves drawing a sample of 12 data values from a normally distributed population.

53	54	55	59
62	62	62	69
73	75	79	86

Calculate the z-score of the minimum of the data set.