There are 9 students in a class and 1 is female. If she is selected as class president, which of the following completes a TRUE sentence? We can reject the null hypothesis of no bias in favour of the female student
a. at α = 0.05.
b. at α = 0.01.
at α = 0.15.
d. at α = 0.10.
Pipefish are present in low numbers in the seagrass beds of Akaroa Harbour. You have data on the number of pipefish caught in a seagrass bed. Which probability distribution is most likely to be the underlying distribution of the population?
Which of the following is NOT a possible value of the correlation coefficient?
You have run a Wilcoxon Rank-Sum test on reaction times in two groups of students in R and get the following output. Using the usual alpha = 0.05, which of the following is true?
> wilcox.test(males,females) Wilcoxon rank sum test data: males and females W = 1691, p-value < 2.2e-16 alternative hypothesis: true location shift is not equal to 0
a. The number of samples was 1691.
b. The two groups differ significantly in their mean reaction times.
The data must have been non-normal.
d. The two groups differ significantly in their mean ranks.
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