In a certain population it is claimed that 80% of people have been vaccinated against Covid19. In a random sample of 45 people from this population, only 32 of them had been vaccinated. Is this a significantly low number that would suggest that the percentage of people who have been vaccinated is less than 80%? (a) No, because 32 is not less than 30.63 (b) Yes, because 32/45 = 71.1%, which is much less than 80%. (c) Yes, because 32 is greater than 30.63 (d) Yes, because .0474 is less than .05 (e) No, because .0474 is less than .05

Answer is a. Please explain