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

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2
Q

What is P?

A

population proportion

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3
Q

How to find bias

A

If mean of P(hat) is too far away from P

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4
Q

P(hat) is call unbiased estimator because

A

The mean of it is equal to p typically

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5
Q

Typically when np >= 10, standard deviation equals

A

square root of p(1-p)/n

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6
Q

What does sampling distribution of x(bar) describe?

A

How statistic x varies in all possible samples

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7
Q

What is the equation of the standard deviation of x(bar)

A

standard dev/square root n

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