question 2 (1 pan When running a t-test what is required to calculate the probability value associated with the test? Select all that are true (there may be more than one correct answer: you must select all the correct answers to get the mark). the t statistic the number of degrees of freedom the skew of the distribution the median Question 5 (1 point) Researchers were investigating the reproductive success of the Madagascar paradise flycatcher Terpsiphone mutata. The number of offspring fledged was measured. The males of the species display two distinct plumage morphs; white and red. White males are found in the north of Madagascar, and red males are found in the south of Madagascar. Researchers found that red males produced more offspring than the white males, and conclude that plumage colour influence reproductive success in these flycatchers. What is a valid potential criticism of the study? O The researchers measured the wrong thing: they should have looked at number of females that mated with the males, not the number of offspring fledged O The study cannot be properly replicated, since all the males are either white or red O The study is confounded by geography: red males may have higher reproductive success because of where they live (the south), not because they are red. Q There is not a comparison with another species to see if red males in other species also have higher reproductive success Question 9 (1 point) Which of the following is a key feature of a cluster sampling design ? 0 Because the samples are clustered - they automatically allow for huge amounts of replication 0 The experimenter is restricted in their sampling to particular e.g. areas, times etc. 0 The researcher is able to completely randomly sample a population 0 The experimenter systematically samples one individual from each 'cluster' they encounter