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Principles of Plant Genetics and Breeding

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162 CHAPTER 9<br />

Part A<br />

Please answer the following questions true or false:<br />

Outcomes assessment<br />

1 Statistics do not prove anything.<br />

2 Lack <strong>of</strong> significant linear regression does not mean a lack <strong>of</strong> relationship.<br />

3 A t-test is used for separating more than three means.<br />

4 Discriminant analysis is used for seeking population groupings.<br />

5 Chi-square analysis is used for testing a hypothesis involving continuous data.<br />

Part B<br />

Please answer the following questions:<br />

1 What is a statistic?<br />

2 Distinguish between st<strong>and</strong>ard error <strong>and</strong> st<strong>and</strong>ard error <strong>of</strong> the mean.<br />

3 Distinguish between simple linear correlation <strong>and</strong> linear regression.<br />

4 What is contingency chi-square analysis?<br />

Part C<br />

Please write a brief essay on each <strong>of</strong> the following topics:<br />

1 Discuss the role <strong>of</strong> statistics in plant breeding.<br />

2 Discuss the issue <strong>of</strong> causality in research.<br />

3 Discuss the application <strong>of</strong> multivariate statistics in plant breeding.<br />

4 Discuss the procedure <strong>of</strong> path analysis <strong>and</strong> its application in breeding.

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