tom wants to know the average number of music...
tom wants to know the average number of musical instruments students in his school play. he used the schools 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. is his conclusion valid? (1 point)\na. yes, because the sample includes both males and females who play musical instruments.\nb. yes, because his representative sample is too large.\nc. yes, because all members of the sample play at least one musical instrument.\nd. no, because he did not choose students randomly.
Answer
# Answer:
D. No, because he did not choose students randomly
# Explanation:
## Step1: Understand sampling requirements
For a conclusion based on a sample to be valid, the sample should be randomly selected.
## Step2: Analyze given sample
The student used band classes as the sample. Band - class students are more likely to play musical instruments compared to the general student population in the school. Since the sample was not randomly chosen from all students in the school, the conclusion that students in the school play an average of three musical instruments is not valid.