Final answer:
The alternative hypothesis suggests the true proportion of medical doctors with degrees from foreign schools is less than 25%, expressed as Ha: p < 0.25.
Step-by-step explanation:
The alternative hypothesis for the situation where a hospital researcher believes that the percentage of medical doctors who received their degrees from foreign schools is less than 25% is Ha: p < 0.25, where p represents the true proportion of medical doctors with degrees from foreign schools. This hypothesis is stating what the researcher suspects might be true, that the percentage is lower than the commonly reported 25%.