Learn Before
Explain how the researcher should proceed using a hypothesis test of the correlation coefficient. What does this test assess regarding the population, and how does its underlying logic connect to other null hypothesis tests?
Case context: A researcher examines the relationship between two quantitative variables: the number of hours of sleep per night and daytime alertness levels. Using their sample data, they calculate Pearson's . They now want to determine whether this sample relationship allows them to conclude that a relationship exists beyond just their study sample.
Question: Explain how the researcher should proceed using a hypothesis test of the correlation coefficient. What does this test assess regarding the population, and how does its underlying logic connect to other null hypothesis tests?
Sample answer: The researcher should perform a hypothesis test of the correlation coefficient. This test will allow them to determine whether a true, non-zero correlation exists within the broader population, sharing the same fundamental logic as other null hypothesis tests to determine if the sample correlation reflects a real population relationship.
Key points:
- Conducts a hypothesis test of the correlation coefficient.
- Assesses whether a true, non-zero correlation exists within the broader population.
- Shares the fundamental logic of other null hypothesis tests.
- Applies to quantitative variables evaluated via Pearson's .
Rubric: The response must explain: 1. That the researcher should conduct a hypothesis test of the correlation coefficient. 2. That the test assesses the existence of a true, non-zero correlation in the broader population. 3. That it shares the fundamental logic of other null hypothesis tests.
0
1
Tags
KPU
Research Methods in Psychology - 4th American Edition @ KPU
Related
Correlation Coefficient as a Test Statistic
What does a hypothesis test of the correlation coefficient specifically assess when evaluating the relationship between quantitative variables using Pearson's r?
Match each term related to a hypothesis test of the correlation coefficient with its specific role in the research process.
A psychologist finds a correlation of r = +.65 between 'number of friends' and 'happiness' in a sample. If the hypothesis test of the correlation coefficient results in a p-value of .07 and the alpha level is set at .05, the psychologist must fail to reject the null hypothesis, even though there is a strong correlation in their sample.
A researcher has calculated a Pearson's in a sample and needs to evaluate if this relationship reflects a true, non-zero correlation in the broader population. Arrange the following steps in the correct logical sequence to justify a conclusion about the population.
When evaluating the relationship between two quantitative variables using Pearson's r, what does the associated hypothesis test specifically assess?
A researcher investigating the link between 'workplace stress' and 'sleep quality' calculates a Pearson’s of -0.40, but the resulting hypothesis test is not statistically significant. Arrange the logical steps in the correct order to analyze why this result prevents a general conclusion about the population.
A researcher conducts a study on 80 students and finds a Pearson's of +0.32 between 'hours of sleep' and 'exam performance.' They perform a hypothesis test to see if this relationship is significant. Match each element of this scenario to its correct role in the hypothesis testing process.
When conducting a hypothesis test of the correlation coefficient, the primary goal is to assess whether a true, non-zero correlation exists within the broader population.
Null Hypothesis for a Correlation Test
Example of a Correlation Test
A researcher finds a Pearson's of in a sample of 15 people but the result is not statistically significant (). The researcher correctly concludes that they cannot claim the variables are related in the broader population because the study lacks sufficient evidence to reject the null hypothesis that the population correlation is _____.
A researcher finds that a Pearson's r of .20 results in a p-value of .02 in one study, but the exact same r of .20 results in a p-value of .45 in a different study. By analyzing the mathematical components of the hypothesis test for the correlation coefficient, it becomes clear that these two studies must have differed in their _____.
Based on the provided text, what is the specific statistical procedure used to evaluate the relationship between quantitative variables using Pearson's , and what does this procedure specifically assess?
Explain how the researcher should proceed using a hypothesis test of the correlation coefficient. What does this test assess regarding the population, and how does its underlying logic connect to other null hypothesis tests?
A psychology student is analyzing the correlation between self-esteem and academic performance (both quantitative variables) in a sample of students using Pearson's . To determine if they can generalize their finding to all students at their university, what specific test must they apply, and what is the null hypothesis testing question they are testing?