Final answer:
When the heteroskedasticity-robust standard error is greater than the regular standard error, the t-statistic is likely to become smaller.
Step-by-step explanation:
When the heteroskedasticity-robust standard error is greater than the regular standard error, the likely impact on statistical measures is that the t-statistic will likely become smaller. This is because the heteroskedasticity-robust standard error takes into account the presence of heteroskedasticity, which can inflate the standard error and reduce the t-statistic. The other options are not likely to be affected by the difference in standard errors.