Standard deviation - Do I use sample or population formula ?
I was hoping is someone could just clear up some confusion that is in the back of my mind please.
how do I determine when calculating standard deviation when its a sample or population ?
For example if I number of spots on a cow, and the values where 7,7,8,7,10,12 would that be a sample ?
Similarly would this be a sample too ?http://gyazo.com/1e989b7d9fa80f3bbdbdca7ee02b0f0e
how do I determine when calculating standard deviation when its a sample or population ?
For example if I number of spots on a cow, and the values where 7,7,8,7,10,12 would that be a sample ?
Similarly would this be a sample too ?http://gyazo.com/1e989b7d9fa80f3bbdbdca7ee02b0f0e
1. Yes, because there are other cows that you didn't account for.
2. A better context is needed. If it's a bunch of people in the whole population, then it's a sample, if it's all of the students in the sixth form, then it's a population, etc.
2. A better context is needed. If it's a bunch of people in the whole population, then it's a sample, if it's all of the students in the sixth form, then it's a population, etc.
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