How to find the critical value of r?
Understand the Problem
The question is asking how to determine the critical value of the correlation coefficient 'r'. This typically involves using statistical tables or software to identify the threshold value for a given level of significance and degrees of freedom.
Answer
Use r = t / sqrt(t^2 + n - 2)
The critical value of r can be found using the formula r = t / sqrt(t^2 + n - 2).
Answer for screen readers
The critical value of r can be found using the formula r = t / sqrt(t^2 + n - 2).
More Information
The critical value of r depends on the sample size and the critical t-value for the desired level of significance.
Tips
Common mistakes include using incorrect degrees of freedom and not using the correct t-value from the t-distribution table.
Sources
- Finding critical r values (Table A-6) - vaia.com
- Critical values for correlation coefficients - mun.ca
- How to calculate critical values for R for a large dataset - stats.stackexchange.com
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