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TLS Online TPP Program

#Question id: 9238

Which of the following is a consequence of biological magnification?

#Section 5: Applied Ecology & Evolution

  1. Toxic chemicals in the environment pose greater risk to top-level predators than to primary consumers.

  2. Populations of top-level predators are generally smaller than populations of primary consumers.

  3. Only a small portion of the energy captured by producers is transferred to consumers.

  4. The amount of biomass in the producer level of an ecosystem decreases if the producer turnover time increases

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TLS Online TPP Program

#Question id: 16790

#Section 3: Mathematics and Quantitative Ecology

For the moderately symmetrical distribution of age of the employees, mean = 20 and mode = 25. The approximate value of the median is: 
TLS Online TPP Program

#Question id: 16791

#Section 3: Mathematics and Quantitative Ecology

The mode of a distribution is 24 and the mean is 60. What is its median? 
TLS Online TPP Program

#Question id: 16874

#Section 3: Mathematics and Quantitative Ecology

A randomly selected sample of 1,000 college students was asked whether they had ever used the drug Ecstasy. Sixteen percent (16% or 0.16) of the 1,000 students surveyed said they had. Which one of the following statements about the number 0.16 is correct?
TLS Online TPP Program

#Question id: 16875

#Section 3: Mathematics and Quantitative Ecology

In a random sample of 1000 students, pˆ = 0.80 (or 80%) were in favor of longer hours at the school library. The standard error of pˆ (the sample proportion) is
TLS Online TPP Program

#Question id: 16876

#Section 3: Mathematics and Quantitative Ecology

For a random sample of 9 women, the average resting pulse rate is x = 76 beats per minute, and the sample standard deviation is s = 5. The standard error of the sample mean is
TLS Online TPP Program

#Question id: 16877

#Section 3: Mathematics and Quantitative Ecology

Assume the cholesterol levels in a certain population have mean μ= 200 and standard deviation σ = 24. The cholesterol levels for a random sample of n = 9 individuals are measured and the sample mean x is determined. What is the z-score for a sample mean x = 180?