What is the regression function describing the relationship?What is a point estimate of the mean muscle mass for a woman aged 55 years?About how much muscle mass does a woman aged 30 to 79 lose each year?

How much of the variability of muscle mass is explained by its linear relationship with age?

Do the residuals plots suggest that the assumptions for simple linear regression are met? Can you suggest other factors that may contribute to the variability in muscle mass?

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