The population that Heinrich is drawing from for his experiment includes all

# The population that heinrich is drawing from for his

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3. The population that Heinrich is drawing from for his experiment includes all apartment renting individuals in Hamilton. Which of the following best describes how Heinrich can collect information to ensure a random sampling of this population? A) Visiting buildings at a variety of locations in Hamilton and speaking with several first floor apartment renters in a random order. B) Placing individuals at random into experimental or control groups regardless of their building location. C) Visiting buildings at a variety of locations in Hamilton and dialling the numbers of random apartments listed at the front door of each. D) Placing individuals who live in apartment buildings in West Hamilton into the experimental group and individuals who live in apartment buildings in East Hamilton into the control group. Correct! This is the best option listed. In this case Heinrich is not biasing his sample towards any particular floor. If he had, location of apartment within the building could act
as a confounding variable. 4. Greg is running an experiment examining spatial memory. Greg's experimental group consists of 20 male undergraduate students ranging in age from 18 to 21 and majoring in a variety of disciplines. Which of the following best describes the control group that Greg should have for this experiment and why? 20 male undergraduate students of any age and majoring in psychology because they would have a better understanding of spatial memory than undergraduates majoring in other disciplines. Correct! Participants in both groups should be as similar as possible. This way, if a difference in the dependent variable is found, it is likely that Greg's manipulation of the independent variable is the cause. 5. Which of the following statements regarding descriptive statistics is true? Correct! The y-axis of a histogram represents frequency or the number of times a data value is counted.

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