Tom wants to know the average number of musical instruments and in his school play. He use the schools to band classes, consisting of a total of 48 students, as his representative sample. He concluded that students in his school play an average of three musical instruments at his conclusion valid?
No, because she did not choose students randomly
Yes, because the sample includes both males and females who play musical instruments
Yes, because all members of the sample play, at least one musical instrument
No, because he is representative sample is too large