It is unlikely to be mere speculation that the number of seats in a typical private school in Manidia, which has both private and public schools, was increased in the 1990s and 2000s. Supporting evidence can be found in the outcomes of two studies, one conducted in 1990 for which the researchers unbiasedly selected around 50% of the private schools and the other in 2010 on the same schools. The studies found that the mean number of seats in those schools in 1990 was 800 and in 2010 was 1000.
Which of the following points to the most serious logical flaw in the reasoning above?
A. The studies did not take the median number of the seats which would have been a better measure of the number of seats in a private school.
B. The findings of the studies contain information of only those private schools that were present in 1990.
C. The mean number of students in Manidia’s schools, both public and private increased around the 1990s and 2000s.
D. During the period covered by the studies, many of the private schools admitted children of employees who had recently moved to Mandia.
E. The average number of seats offered for admission in a school is not the correct parameter for judging the actual number of students studying in a school at any given point.