Loose Ends Chapter 7 Flashcards
1
Q
What is a sampling distribution
A
distribution of all possible values of proportion, center is close to true population proportion
2
Q
What is P?
A
population proportion
3
Q
How to find bias
A
If mean of P(hat) is too far away from P
4
Q
P(hat) is call unbiased estimator because
A
The mean of it is equal to p typically
5
Q
Typically when np >= 10, standard deviation equals
A
square root of p(1-p)/n
6
Q
What does sampling distribution of x(bar) describe?
A
How statistic x varies in all possible samples
7
Q
What is the equation of the standard deviation of x(bar)
A
standard dev/square root n