Understanding Statistics in Intelligence Testing
Group 1
Statistics are often used to describe and interpret the results of intelligence testing.
Question 1a
Describe three measures of central tendency (mean, median, and mode).
Question 1b
Describe a skewed distribution.
Question 1c
Relate the three measures of central tendency to a normal distribution.
Question 1d
Relate the three measures of central tendency to a positively skewed distribution.
Question 1e
An intelligence test for which the scores are normally distributed has a mean of 100 and a standard deviation of 15. Use this information to describe how the scores are distributed.
Question 1f
In two normal distributions, the means are 100 for group I and 115 for group II. Can an individual in group I have a higher score than the mean score for group II? Explain.
Group 2
Apply knowledge of psychological research in answering the following questions about intelligence scores.
Question 2a
Explain why norms for standardized intelligence tests are periodically updated.
Question 2b
Describe how to determine whether an intelligence test is biased.
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