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TLS Online TPP Program

#Question id: 10708

Which of the following statements is a likely explanation for why invasive species take over communities into which they have been introduced?

#Section 1: Ecology
  1. Invasive species are less efficient than native species in competing for the limited resources of the environment.
  2. Invasive species are not held in check by the predators and agents of disease that have always been in place for native species.
  3. Invasive species have a higher reproductive potential than native species.
  4. Invasive species come from geographically isolated regions, so when they are introduced to regions where there is more competition, they thrive
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TLS Online TPP Program

#Question id: 16889

#Section 3: Mathematics and Quantitative Ecology

Assuming the conditions are met, based on the t-statistic of 1.80 the appropriate conclusion for this test using α = .05 is: (Table would be provided with exam.)
TLS Online TPP Program

#Question id: 16890

#Section 3: Mathematics and Quantitative Ecology

A test of H0: μ = 0 versus Ha: μ > 0 is conducted on the same population independently by two different researchers. They both use the same sample size and the same value of α = 0.05. Which of the following will be the same for both researchers?
TLS Online TPP Program

#Question id: 16891

#Section 3: Mathematics and Quantitative Ecology

Which of the following is not a correct way to state a null hypothesis?
TLS Online TPP Program

#Question id: 16892

#Section 3: Mathematics and Quantitative Ecology

A test to screen for a serious but curable disease is similar to hypothesis testing, with a null hypothesis of no disease, and an alternative hypothesis of disease. If the null hypothesis is rejected treatment will be given. Otherwise, it will not. Assuming the treatment does not have serious side effects, in this scenario it is better to increase the probability of:
TLS Online TPP Program

#Question id: 16893

#Section 3: Mathematics and Quantitative Ecology

A random sample of 25 college males was obtained and each was asked to report their actual height and what they wished as their ideal height. A 95% confidence interval for μd = average difference between their ideal and actual heights was 0.8" to 2.2". Based on this interval, which one of the null hypotheses below (versus a two-sided alternative) can be rejected?
TLS Online TPP Program

#Question id: 16894

#Section 3: Mathematics and Quantitative Ecology

The average time in years to get an undergraduate degree in computer science was compared for men and women. Random samples of 100 male computer science majors and 100 female computer science majors were taken. Choose the appropriate parameter(s) for this situation.