Having diagnosed non-constant variance, consider four options for summarizing these data: (1) do nothing; use the ols fit computed previously; (2) use ols for fitting but the bootstrap to estimate...

Having diagnosed non-constant variance, consider four options for summarizing these data: (1) do nothing; use the ols fit computed previously; (2) use ols for fitting but the bootstrap to estimate standard errors; (3) use wls with the variance function

(4) use ols for fitting by the correction for non-constant variance described in Section 7.2.1. Compare the solutions for the slope and its standard error.