I am completely lost with standard dev and have to do it as part of a lean course for work. The question I have been set is probably very simple, but I want to know the workings to get to the answer:
a population has a mean of 51 and a standard deviation of 3.4. If repeated samples of 20 units are taken from this population, what is the likely standard dev of the sample means
0.76
3.4
0.17
2.55
a population has a mean of 51 and a standard deviation of 3.4. If repeated samples of 20 units are taken from this population, what is the likely standard dev of the sample means
0.76
3.4
0.17
2.55