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# Unit 3: Exploring one-variable quantitative data: Summary statistics

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## About this unit

This unit covers common measures of center like mean and median. We'll also learn to measure spread or variability with standard deviation and interquartile range, and use these ideas to determine what data can be considered an outlier.### Practice

- Calculating mean and median from data displaysGet 3 of 4 questions to level up!

### Learn

### Practice

- Missing value given the meanGet 3 of 4 questions to level up!
- Effects of shifting, adding, & removing a data pointGet 3 of 4 questions to level up!
- Estimating mean and median in data displaysGet 3 of 4 questions to level up!

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

### Learn

### Practice

- Interquartile range (IQR)Get 3 of 4 questions to level up!
- Sample standard deviationGet 3 of 4 questions to level up!
- Visually assess standard deviationGet 3 of 4 questions to level up!

### Learn

### Practice

- Transforming dataGet 3 of 4 questions to level up!

### Learn

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

### Learn

### Practice

- Reading box plotsGet 3 of 4 questions to level up!
- Interpreting quartilesGet 3 of 4 questions to level up!
- Identifying outliersGet 3 of 4 questions to level up!

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

Up next for you:

Level up on all the skills in this unit and collect up to 1100 Mastery points!#### Unit test

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