The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 27 - One-Way Analysis of Variance: Comparing Several Means - Apply Your Knowledge - Page 652: 27.3a

Answer

There are more trees in group 1 compared to group 2 and 3. This is because group 1 has the highest mean.

Work Step by Step

Group means of the stem and leaf plots Group 1 16+19+19+20+21+22+24+27+27+28+29+33=285 285/12=23.750 Group 2 2+9+12+12+14+14+15+17+17+18+19+20=169 169/12=14.083 Group 3 4+12+12+15+18+18+19+22+22=142 142/9=15.778
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