2. Describing Data with Tables and Graphs

2. Describing Data with Tables and Graphs / Visualizing Qualitative vs. Quantitative Data / 문제 1

문제 1

Given the following class intervals and frequencies: 10-19 (5), 20-29 (8), 30-39 (12), 40-49 (7), what are the midpoints for the frequency polygon?

14.5, 24.5, 34.5, 44.5

10, 20, 30, 40

19, 29, 39, 49

15, 25, 35, 45