Which of the following is a justified conclusion if a correlation is negative
If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. 2. If a calculation of Pearson’s r yields a value of −.96, which of the following statements is false? [TY9.2]
Answer: B 3. As part of a psychology assignment Kate has to calculate Pearson’s r to measure the strength of association between two variables. She finds that r = −.2 and that this is significant at her selected alpha level of .05. What should she conclude? [TY9.3]
Answer: A 4. The correlational fallacy refers to which of the following? [TY9.4]
Answer: C 5. A group of researchers conducts some research in which they identify a significant positive correlation (r = .42) between the number of children people have and their life satisfaction. Which of the following is it inappropriate to conclude from this research? [TY9.5]
Answer: A 6. Which of the following statements is true of the problem of restricted range? [TY9.6]
Answer: D 7. If an experimenter observes a correlation of −1 between two variables, which of the following is false? [TY9.7]
Answer: B 8. If the correlation between people’s wealth and a measure of their psychological well-being is .40, how much of the variation in their scores on the well-being measure will be associated with variation in their wealth? [TY9.8]
Answer: C 9. A researcher conducts some research in which they identify a significant positive correlation (r = .42) between the number of children a person has and their life satisfaction. Which of the following is it inappropriate to conclude from this research?
Answer: A 10. A researcher conducts a survey with 221 participants who each complete 24 measures designed to assess the impact of social and psychological factors (such as demands, social support and role clarity) on stress in the workplace. As part of her analysis she investigates the correlations between pairs of these variables. How many degrees of freedom will her analysis have?
Answer: C 11. “A graph plotting the scores on one variable against the scores on another.” What type of graph is this a glossary definition of?
Answer: C 12. “A relationship between two variables that can be described by a straight line. The equation for such a line is y = a + bx, where b is the slope of the line (its gradient) and a is the y intercept (where it cuts the vertical axis).” Which type of relationship is this a glossary definition of?
Answer: A 13. “A measure of the degree of linear association between two variables.” What is this a glossary definition of?
Answer: A 14. “The amount of variation in one variable associated with variation in another variable (or variables). In the bivariate case this is given by r2.” What is this a glossary definition of?
Answer: C 15. “A barrier to the correct interpretation of results that arises when the range of scores is limited because they are clustered in the region of the maximum scale value.” What specific type of effect is this a glossary definition of? |