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# Unit 9: Sampling distributions

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## About this unit

A sampling distribution shows every possible result a statistic can take in every possible sample from a population and how often each result happens - and can help us use samples to make predictions about the chance tht something will occur. This unit covers how sample proportions and sample means behave in repeated samples.### Practice

- Probability in normal density curvesGet 3 of 4 questions to level up!

### Learn

### Practice

- Sample means and the central limit theoremGet 3 of 4 questions to level up!

### Practice

- Biased and unbiased estimatorsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

### Learn

### Practice

- The normal condition for sample proportionsGet 3 of 4 questions to level up!
- Mean and standard deviation of sample proportionsGet 3 of 4 questions to level up!
- Finding probabilities with sample proportionsGet 3 of 4 questions to level up!

### Learn

### Practice

- Mean and standard deviation of difference of sample proportionsGet 3 of 4 questions to level up!
- Shape of sampling distributions for differences in sample proportionsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

### Learn

### Practice

- Mean and standard deviation of sample meansGet 3 of 4 questions to level up!
- Finding probabilities with sample meansGet 3 of 4 questions to level up!

### Learn

### Practice

- Mean and standard deviation of difference of sample meansGet 3 of 4 questions to level up!
- Shape of sampling distributions for differences in sample meansGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

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Level up on all the skills in this unit and collect up to 1200 Mastery points!#### Unit test

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