Math Problem Statement
The table below gives the age and bone density for five randomly selected women. Using this data, consider the equation of the regression line, yˆ=b0+b1x , for predicting a woman's bone density based on her age. Keep in mind, the correlation coefficient may or may not be statistically significant for the data given. Remember, in practice, it would not be appropriate to use the regression line to make a prediction if the correlation coefficient is not statistically significant.
Age 47 49 51 58 63 Bone Density 360 353 336 333 332
Find the estimated y-intercept. Round your answer to three decimal places.
Solution
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Math Problem Analysis
Mathematical Concepts
Linear Regression
Statistics
Correlation
Formulas
Regression line equation: yˆ = b0 + b1x
Slope (b1): b1 = Σ((xi - x̄)(yi - ȳ)) / Σ(xi - x̄)^2
Y-intercept (b0): b0 = ȳ - b1x̄
Theorems
Least Squares Method
Correlation Coefficient Significance
Suitable Grade Level
Grades 11-12
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