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Course: AP??/College Statistics?>?Unit 3
Lesson 3: Measuring variability in quantitative data- Interquartile range (IQR)
- Interquartile range (IQR)
- Sample variance
- Sample standard deviation and bias
- Sample standard deviation
- Visually assessing standard deviation
- Visually assess standard deviation
- Mean and standard deviation versus median and IQR
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Sample standard deviation
Problem
A teacher weighed the backpacks of students. Here are the weights (in kilograms):
The mean is .
Which of these formulas gives the standard deviation?