At a local university,only 62% of the original freshman class graduated in four years.Has this percentage changed?

A) H0: p ≠ 0.62 HA: p = 0.62
B) H0: p < 0.62 HA: p > 0.62
C) H0: p < 0.62 HA: p = 0.62
D) H0: p = 0.62 HA: p ≠ 0.62
E) H0: p = 0.62 HA: p < 0.62

H0: p = 0.62 represents the null hypothesis that the proportion of students graduating in four years is 0.62 in the population.
HA: p ≠ 0.62 represents the alternative hypothesis that the proportion of students graduating in four years is not equal to 0.62 in the population.
This is the appropriate hypothesis test as we want to determine if there is a significant difference between the observed proportion of 0.62 and the true population proportion.