Sampling Flashcards
0
Q
The mean of a sample is?
A
The same mean as before
1
Q
The variance of a sample is?
A
The variance divided by n (the sample size)
2
Q
What is the central limit theorem?
A
If n is sufficiently large (over 30) x bar can be approximated to a normal distribution
3
Q
What is an unbiased estimate of the mean, mu, of a population?
A
It is the same as the sample mean
5
Q
What is an unbiased estimate of the variance, s squared, of a population?
A
It is s^2 = n/n-1 times by the variance
