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Basic Sample Statistics and Parameters

Degrees of Freedom

Questions

Question 1 out of 3.
You know the population mean for a certain test score. You select 10 people from the population to estimate the standard deviation. How many degrees of freedom does your estimation of the standard deviation have?

Question 2 out of 3.
You do not know the population mean for a different test score. You select 15 people from the population and use this sample to estimate the mean and standard deviation. How many degrees of freedom does your estimation of the standard deviation have?

Question 3 out of 3.
For which of these degrees of freedom do you think your sample statistic is the least likely to be an accurate representation of the population parameter?
21
5
2
100