Math 15 – Elementary Statistics Chapter 5 – Part 2 Summarizing Data Numerically

Measuring Spread Class A – 73, 74, 75, 76, 77 Class B – 55, 65, 75, 85, 95

Measuring Spread Class A – 73, 74, 75, 76, 77 Class B – 55, 65, 75, 85, 95

Variance and Standard Deviation

Example

Percentiles

Exam Scores – 32, 35, 43, 56, 66, 69, 73, 74, 75, 77, 78, 79, 80, 81, 83, 85, 87, 88, 92, 98 Median (50 th percentile) Quartiles (25 th and 75 th percentiles)

Percentiles Exam Scores – 32, 35, 43, 56, 66, 69, 73, 74, 75, 77, 78, 79, 80, 81, 83, 85, 87, 88, 92, th percentile?

IQR and 5 – Number Summary

Outliers?

Yuck? What are you learning here?

Example

Arcata Real Estate – Described Numerically and Graphically!