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?
a 80 students selected at random during lunch
b all members of the Math Club
c 45 first-year students selected at random
d 50 female students selected at random
A 80 students selected at random during lunch is the best sample for this situation.
All customers who bought the new coffee is the population in this situation.
No, because he did not choose students randomly.
No, because not all students in the sample have extracurricular activities.
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
all customers who bought the new coffee
all customers who did not buy the new coffee
the first 50 customers who bought the new coffee
om 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 his representative sample is too large.
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 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 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.
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 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 200 students in the sample is too large.
Yes, because only those who have extracurricular activities were included in the sample.
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.
Which of the following defines propaganda?(1 point)
Responses
an advertisement with very positive language that evoke positive emotions
a technique used in media to influence people's opinions, attitudes, and behavior
an activity or cause that currently is popular and attracts more and more followers
the use of products because a celebrity or well-known individual uses them