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