MATH 225N Week 8 Assignment; Understand the Difference Between Correlation and Causation- Explanation

  • MATH 225N Week 8 Assignment; Understand the Difference Between Correlation and Causation- Explanation
  • $5.00


Institution MATH 225N Statistical Reasoning for the Health Sciences
Contributor Gbenga
  1. Question: How to Determine the Significance of the Correlation Coefficient

Given the r-value and the size of the sample, n,

  1. Find the degrees of freedom (df).

df=n−2,

where n is the sample size.

  1. Find the critical values in the table (using the degrees of freedom).
  2. Compare r to the appropriate critical value in the table to make a conclusion.
    - If r is 
    not between the positive and negative critical values, then the correlation coefficient is significant, meaning we can trust its validity and use the line for prediction. 
    - If r is between the positive and negative critical values, then the correlation coefficient is 
    not significant, and we shoud not use the line for prediction. 
  1. Question: Suppose you computed r=0.801 using n=10 data points. Using the critical values table below, determine if the value of r is significant or not

 

Instituition / Term
Term Fall 2020
Institution MATH 225N Statistical Reasoning for the Health Sciences
Contributor Gbenga
 

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