Statistical Inference Flashcards Preview

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Flashcards in Statistical Inference Deck (9)
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1
Q

What are the two ways that data are collected?

A

Observational study

Designed experiment

2
Q

Describe an observational study

A

Record measurements without control over how they are produced

3
Q

Describe a designed experiment

A

You control the conditions that create the measurement

4
Q

What are the two properties of estimators we want to have?

A

Unbiased

The more data we collect, the more precise our estimate should become

5
Q

What properties does the sample mean have?

A

Unbiased and consistent estimator of the population mean

6
Q

What properties does the sample variance have?

A

Unbiased estimator of the population variance

7
Q

What is a type I error?

A

Reject H0 when H0 is true

8
Q

What is a type II error?

A

Fail to reject H0 when H0 is false

9
Q

What is the p value?

A

Probability of observing a test statistic T at least as extreme as the observed test statistic, t, given the null hypothesis is true