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Bivariate Regression: Identify the Unstandardized Regression Coefficient

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Using the bivariate regression table attached, determine what the predicted CDRS score would be if the adolescent's RADS score was 70. Provide the (a) bivariate regression equation; (b) identify the intercept and unstandardized regression coefficient, and (c) show how you calculated the predicted Y.

- Assume RADS is an X (predictor or independent) variable
- Assume AGE is an X (predictor or independent) variable
- Assume CDRS is the Y (response or dependent) variable.
- Assume the level of significance for all statistical tests is p = 0.05
- Assume the research hypotheses are non-directional.

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Solution Summary

The expert identifies the understandardized regressions coefficient using bivariate regression.

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Please see the attached file for full solutions.

a) bivariate regression equation;
Y=38.863+0.268X

b) identify ...

Solution provided by:
Changping Wang, MA
Education
  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
  • "Thank you"
  • "Thank you very much for your valuable time and assistance!"
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