Tom wants to know the average number of musical instruments students in his school play. He used the school's two band classes, consisting of a total of 48 students, as his representive sample. He concluded that students in his school play an average of three musical instruments. Is his conclusion valid?
A. No, Because he did not choose students randomly.
B. Yes, because all members of the sample play at least one musical instrument.
C. No, because his representative sample is too large.
D. Yes, because the sample includes both males and females who play musical instruments.
A. No, Because he did not choose students randomly.
A coffee shop owner is intrested in determining what people think about the new coffee flavor. Which of the following is the population in this situation?
A. the first 50 customers who bought the new coffee
B. 100 random customers
C. all customers who did not buy the coffee
D. all customers who bought the coffee
D. all customers who bought the coffee
A school principal wants to know the average number of extracurricular activities students in her school are involved in. She assigned each student a number from 1 to 415. Using a random number generator, she selected 200 students to be part of the sample. She conducted that students to be part of the sample. She concluded that students are involved in an average of two extracurricular activities. Is the principal's conclusion valid?
A. No, because not all students in the sample have extracurricular activities.
B. No, because 200 students in the sample is too large.
C. Yes, because every student had an equal chance to be part of the sample. The sample size also appears to be large enough.
D. Yes, because only those who have extracurricular activities were included in the sample.