A Test Was Made Of $H _ { 0 } : \mu _ { 1 } = \mu _ { 2 }$

question 99

Multiple Choice

A test was made of $H _ { 0 } : \mu _ { 1 } = \mu _ { 2 }$ versus $H _ { 1 } : \mu _ { 1 } < \mu _ { 2 }$ . The sample means were $\bar { x } _ { 1 } = 13$ and $\bar { x } _ { 2 } = 12$ , the sample standard deviations were $s _ { 1 } = 4$ and $s _ { 2 } = 3$ , and the sample sizes were $n _ { 1 } = 16$ and $n _ { 2 } = 15$ .
How many degrees of freedom are there for the test statistic?

• A) 15
• B) 16
• C) 11
• D) 14

Compare different hypotheses explaining the indirect benefits of female mate choice.

Recognize the impact of sexual conflict on the evolution of reproductive strategies and morphology.

Analyze the strength of sexual selection among males in different species based on reproductive data.

Explain the reversal of sexual dimorphism roles in certain species and its relation to sexual selection theory.

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