You want to estimate the number of students who bring their lunch to school every day. Which of the following is the best sample for this situation?(1 point)
Responses bot
all members of the Math Club
all members of the Math Club
50 female students selected at random
50 female students selected at random
45 first-year students selected at random
45 first-year students selected at random
80 students selected at random during lunch
80 students selected at random during lunch
A coffee shop owner is interested in determining what people think about the new coffee flavor. Which of the following is the population in this situation?(1 point)
Responses
100 random customers
100 random customers
all customers who did not buy the new coffee
all customers who did not buy the new coffee
the first 50 customers who bought the new coffee
the first 50 customers who bought the new coffee
all customers who bought the new coffee
all customers who bought the new coffee
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 representative sample. He concluded that students in his school play an average of three musical instruments. Is his conclusion valid?(1 point)
Responses
No, because he did not choose students randomly.
No, because he did not choose students randomly.
No, because his representative sample is too large.
No, because his representative sample is too large.
Yes, because all members of the sample play at least one musical instrument.
Yes, because all members of the sample play at least one musical instrument.
Yes, because the sample includes both males and females who play musical instruments.
Yes, because the sample includes both males and females who play musical instruments.
No, because he did not choose students randomly.
A survey is conducted to determine the most common reason people own a cell phone. A company sent out a survey to customers between the ages of 20 and 30. Based on the responses, the company concluded that people own a cell phone for messaging purposes. Is this conclusion valid?(1 point)
Responses
No, because the sample includes customers of too many different ages.
No, because the sample includes customers of too many different ages.
Yes, because the sample includes male and female customers.
Yes, because the sample includes male and female customers.
No, because not all people who own a cell phone have the same probability of being selected.
No, because not all people who own a cell phone have the same probability of being selected.
Yes, because the sample includes all customers between the ages of 20 and 30.
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 concluded that students are involved in an average of two extracurricular activities. Is the principal’s conclusion valid?(1 point)
Responses
No, because not all students in the sample have extracurricular activities.
No, because not all students in the sample have extracurricular activities.
Yes, because every student had an equal chance to be part of the sample. The sample size also appears to be large enough.
Yes, because every student had an equal chance to be part of the sample. The sample size also appears to be large enough.
Yes, because only those who have extracurricular activities were included in the sample.
Yes, because only those who have extracurricular activities were included in the sample.
No, because 200 students in the sample is too large.