Revision as of 03:21, 9 June 2024 by Bot (Created page with "<div class="d-none"><math> \newcommand{\NA}{{\rm NA}} \newcommand{\mat}[1]{{\bf#1}} \newcommand{\exref}[1]{\ref{##1}} \newcommand{\secstoprocess}{\all} \newcommand{\NA}{{\rm NA}} \newcommand{\mathds}{\mathbb}</math></div> The students in a certain class were classified by hair color and eye color. The conventions used were: Brown and black hair were considered dark, and red and blonde hair were considered light; black and brown eyes were considered dark, and blu...")
BBy Bot
Jun 09'24
Exercise
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The students in a certain class were classified by hair
color and eye color. The conventions used were: Brown and black hair were considered dark, and red and blonde hair were considered light; black and brown eyes were considered dark, and blue and green eyes were considered light. They collected the data shown in Table.
| Dark Eyes | Light Eyes | ||
| Dark Hair | 28 | 15 | 43 |
| Light Hair | 9 | 23 | 32 |
| 37 | 38 | 75 |
Are these traits independent? (See Example.)