Which of the Following Statements Are Not Necessarily True About $\left( X _ { 1 } , Y _ { 1 } \right) , \left( X _ { 2 } , Y _ { 2 } \right) , \ldots \ldots , \left( X _ { n } , Y _ { n } \right)$

question 25

Multiple Choice

Which of the following statements are not necessarily true about the paired t test?

• A) The data consists of n independently selected pairs \(\left( X _ { 1 } , Y _ { 1 } \right) , \left( X _ { 2 } , Y _ { 2 } \right) , \ldots \ldots , \left( X _ { n } , Y _ { n } \right)\)
• B) The differences \(X _ { 1 } - Y _ { 1 } , X _ { 2 } - Y _ { 2 } , \ldots \ldots , X _ { n } - Y _ { n }\)
• Are assumed to be normally distributed.
• C) The X and Y observations within each pair \(\left( X _ { 1 } , Y _ { 1 } \right) , \left( X _ { 2 } , Y _ { 2 } \right) , \ldots \ldots , \left( X _ { n } , Y _ { n } \right)\)
• Are independent.
• D) The \(\bar { X } \text { and } \bar { Y }\)
• Are not independent of one another.
• E) All of the above statements are true.

Explain the environmental limitations on the distribution of nonvascular plants.

Clarify the evolutionary relationships among nonvascular plant clades and between nonvascular and vascular plants.

Interpret the significance of specific plant features like sporangia, stomata, and vascular tissues in plant evolution.

Describe the lifecycle transitions and dependencies in nonvascular and vascular plants.

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