What type of car is more popular among college​ students, American or​ foreign? One hundred​ fifty-nine college students were randomly sampled and each was asked which type of car he or she prefers. A computer package was used to generate the printout to the right for the proportion of college students who prefer American automobiles. Is the sample large enough for the interval to be​ valid? SAMPLE PROPORTIONequals0.396226 SAMPLE SIZEequals159 UPPER LIMITequals0.46954 LOWER LIMITequals0.331194