Questions Wrong on Chapter 1 Quiz
A statistically significant difference between two sample groups is NOT likely to be:
due to chance variation within and between the sample groups.
When Mr. Adams calculated his students' algebra test scores, he noticed that 2 students had extremely low scores. Which measure of central tendency is affected most by the scores of these 2 students?
mean
A normal curve would approximate the distribution of:
the physical heights of all American women
To compare the pace of life in different countries, investigators measured the speed with which postal clerks completed a simple request. Which research method did this illustrate?
Naturalistic observation
An extensive survey revealed that children with relatively high self-esteem tend to perceive God as kind & loving, whereas those with lower self-esteem tend to perceive God as angry. The researchers concluded that the children's self-esteem had apparently influenced their views of God. This conclusion best illustrates the danger of:
assuming that association proves causation
Researchers use experiments rather than other research methods in order to isolate:
causes from effects
Random assignment minimizes _______________ between experimental and control groups. Random sampling minimizes ___________ between a sample & population.
differences; differences
The placebo effect best illustrates the impact of _________________ on feelings and behaviors.
positive expectations
Which measure of variation is affected most by a few extreme scores?
range
To represent the correlation between two variables graphically, researchers often construct a:
scatterplot
As the size of a representative sample increases, the __________ of that sample is most likely to decrease.
standard deviation
Which of the following methods is most helpful for clarifying cause-effect relationships?
the experiment