Rodell wants to find the favorite gaming app among the students at his school. he decides to poll the thirty students on his football team and the fifteen students on his basketball team to gather the data. what is wrong with rodell's method for collecting his data? rodell only polled male athletes; this sample does not represent the girls or nonathletes at the school. rodell needs a larger sample size than two sports teams to represent a whole school. rodell polled everyone on his teams; he should have only polled every other student for it to be a true sample. rodell's polling method only included fall and winter sports; he should have also included a spring sport like baseball.

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?