Worksheets9/25 Review 2
Total questions: 10
Worksheet time: 7mins
Tamil wants to see whether listening to Mozart will improve students’ performance on geometry exams. It is most important that her experimental group consist of
students who already listen to Mozart
students randomly assigned to listen to Mozart.
students randomly assigned not to listen to Mozart
students who have already completed geometry.
students who have never studied geometry.
Which is typical of a positively skewed distribution?
The mean is higher than the median.
The mean is lower than the median
There are more high scores than low scores.
The mode is higher than the median but lower than the mean.
The mode is lower than the median but higher than the mean.
Banu scored 130 on the WISC (IQ test). What is his z score and approximately what percentile is he in?
-2, 2nd
−2, 16th
0, 50th
2, 90th
2, 98th
In a normal distribution,
95 percent of the scores fall within one standard deviation of the mean.
everyone scores within three standard deviations of the mean
the mean is always greater than the median.
the mean, median, and mode are all equal.
the standard deviation is always less than 1.0.
In a normal distribution, approximately what percentage of people’s scores fall between the z scores of −2 and +2?
25
50
68
95
82
Sabrina finds a strong, negative correlation between hours spent meditating and reported stress levels. Her findings indicate that
if a person meditates daily, she or he will not experience any stress.
people who meditate a lot tend to have higher stress levels.
meditation lowers stress levels in humans.
people with low stress levels meditate more than people with high stress levels.
the failure to meditate is a major cause of stress in humans.
Dr. Hernandez believes that poverty lies at the root of most of her inner-city clients’ mental illnesses. This perspective is best labeled
humanistic
sociocultural
biomedical
cognitive
behavioral
Wilhelm Wundt’s early work led to the theory of
functionalism
Gestalt Pyschology
psychodynamic
repression
structuralism
5. Consider the following scatterplot of midterm and final exam scores for a class of 15 students.
What does it show?
weak, negative correlation
strong, negative correlation
strong, positive correlation
weak, negative correlation
no correlation
Which research method would most likely be used to test the following hypothesis: People who conserve energy by buying hybrid cars are more likely to spend more money on organic foods.
experiment
naturalistic observation
case study
correlation
