Question

5) A researcher wants to know if naturally occurring testosterone levels are associated with aggresion. Which role is testosterone playing?

a.) IV

b.) Predictor

c.) Explanatory variable

d.) Predictor variable

7) TRUE OR FALSE: Systematic random sampling is similar to simple random
sampling except intact groups such as churches, schools or
clubs are selected rather than individuals.

8) TRUE OR FALSE: When using purposive sampling, the researcher uses his or her
judgement to select participants.

10) Your boss tells you to interview ten Democrats and ten Republicans. Which sampling technique do you need to use?

a.) quota

b.) convenience

c.) stratified

d.) cluster  

11) TRUE OR FALSE: All things being equal, larger samples are more representative.

Answer 1

5) Here testosterone is playing the role of b) predictor because here testosterone levels are Explanatory variable or Predictor variable but testosterone itself is predictor.

7) The given statement is False because, systematic random sampling is a type of probability sampling method in which sample members from a larger population are selected according to a random starting point but with a fixed, periodic interval. Under simple random sampling, a sample of items is chosen randomly from a population, and each item has an equal probability of being chosen whereas systematic sampling involves selecting items from an ordered population using a skip or sampling interval.

8) The given statement is True because, purposive sampling is a sampling technique in which researcher relies on his or her own judgment when choosing members of population to participate in the study.

10) Here the sampling technique we need to use is c.) stratified sampling because in this sampling technique we divide members of the population into homogeneous subgroups (here Democrats and Republicans) before sampling.

11) The given statement is True because, larger sample sizes give more reliable results with greater precision and power, although they also cost more time and money but here it is not to be considered.