Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 14633
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
More Questions
TLS Online TPP Program

#Question id: 16882

#Section 3: Mathematics and Quantitative Ecology

A hypothesis test is done in which the alternative hypothesis is that more than 10% of a population is left-handed. The p-value for the test is calculated to be 0.25. Which statement is correct?
TLS Online TPP Program

#Question id: 16883

#Section 3: Mathematics and Quantitative Ecology

Which of the following is NOT true about the standard error of a statistic?
TLS Online TPP Program

#Question id: 16884

#Section 3: Mathematics and Quantitative Ecology

A prospective observational study on the relationship between sleep deprivation and heart disease was done by Ayas, et. al. (Arch Intern Med 2003). Women who slept at most 5 hours a night were compared to women who slept for 8 hours a night (reference group). After adjusting for potential confounding variables like smoking, a 95% confidence interval for the relative risk of heart disease was (1.10, 1.92). Based on this confidence interval, a consistent conclusion would be
TLS Online TPP Program

#Question id: 16885

#Section 3: Mathematics and Quantitative Ecology

Consider a random sample of 100 females and 100 males. Suppose 15 of the females are left-handed and 12 of the males are left-handed. What is the estimated difference between population proportions of females and males who are left-handed (females − males)? Select the choice with the correct notation and numerical value.
TLS Online TPP Program

#Question id: 16886

#Section 3: Mathematics and Quantitative Ecology

A result is called “statistically significant” whenever
TLS Online TPP Program

#Question id: 16887

#Section 3: Mathematics and Quantitative Ecology

The confidence level for a confidence interval for a mean is