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Week Six Homework Exercise
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Answer the following questions, covering material from Ch. 12 of the Methods in Behavioral Research text:
A researcher is studying reading rates in milliseconds per syllable. What scale of measurement—nominal, ordinal, interval, or ratio—is time in milliseconds? Explain your response. (1 point)
Under what circumstances is the median or mode a better measure of central tendency than the mean? Explain your response
True or false: The standard deviation and the range are sensitive to outliers. Explain your response. (1 point)
True or false: The standard deviation can never be 0. Explain your response. (1 point)
The Pearson r correlation coefficient is used with _ level data. Pearson r coefficients can range from to __. (2 points)
A researcher is investigating the effects of anxiety on creativity. Individuals with varying levels of anxiety are asked to complete a measure of creativity. The results show a classic U-shaped distribution; that is, individuals with moderate levels of anxiety score the highest on tests of creativity. Individuals with very low or very high levels of anxiety score much lower on tests of creativity. Would the Pearson r correlation coefficient be a good statistic to use in this case? Explain your response. (2 points)
An experimenter is examining the relationship between age and self-disclosure. A large sample of participants that are 25 to 35 years old and participants that are 65 to 75 years old are compared, and significant differences are found with younger participants disclosing much more than older people. The researcher reports an effect size of .34. What does this mean? (2 points)
