40 statistics questions
Exercise 13: Understanding Pearson Product-Moment Correlation Coefficient
Questions to Be Graded
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Date: 31-07-2020
1: Were the vegetable intakes for both the parents and children in this study adequate? Provide a rationale for your answer.
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2: What is the value of the Pearson r for the relationship between child self-esteem and body esteem? Describe this relationship and discuss its statistical significance.
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3: What is the largest relationship in Table 3? What percentage of variance was explained by this relationship? Show your calculations and round your answer to two decimal places.
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4: Is the relationship in Question 3 clinically important? Is the relationship statistically significant? Provide rationales for your answers.
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5: Describe the correlation r = −0.40* using words. Is this a statistically significant correlation? Provide a rationale for your answer.
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6: State the null hypothesis for Question 5. Was the hypothesis accepted or rejected? Provide a rationale for your answer.
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7: What Pearson r value was calculated for the relationship between sedentary behavior and BMI%? What were the effect size (ES) and strength of this relationship? Provide a rationale for your answer.
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8: Is the relationship between sedentary behavior and BMI% statistically significant? Is the relationship clinically important? Provide a rationale for your answers.
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9: In a hypothetical study, BMI and perceived quality of life were correlated at Pearson r = 0.41. The sample size was N = 80, α = 0.05, and the data were examined with a two-tailed test. Using the Table of Critical Values for Pearson r in Appendix B, determine if r = 0.41 is statistically significant. Provide a rationale for your answer.
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10: Are the findings from the Hartson et al. (2018) study ready for use in practice? Provide a rationale for your answer.
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- s_name: Amanda
- sclass: Stats