Final answer:
The student's final height at age 18 cannot be accurately predicted based solely on the heights of family members and the student's current height at age 14, as various genetic and environmental factors play a role in determining final adult stature.
Step-by-step explanation:
Height prediction cannot be accurately determined solely based on the information provided, as many factors can influence a person's final height. Considering the provided family height information and typical growth patterns, a rough estimate might suggest that your adult height would be influenced by your genetic background.
However, it is important to note that height prediction methods often incorporate various factors, including nutritional status, health conditions, and overall well-being, none of which are mentioned in your query.
According to scientific data, both nature (genetics) and nurture (environment) play critical roles in determining a person's ultimate stature. Since girls tend to have their growth spurt earlier than boys and typically reach adult height by age 15, the likelihood of considerable growth after age 14 is reduced but not impossible. The heights of the family members suggest a trend towards shorter stature, which may influence the final adult height to some degree, but this is not definitive.