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
50 female students selected at random
50 female students selected at random
80 students selected at random during lunch
80 students selected at random during lunch
all members of the Math Club
all members of the Math Club
45 first-year 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
all customers who bought the new coffee
all customers who bought the new coffee
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
100 random customers
100 random customers
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 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.
No, because he did not choose students randomly.
No, because he did not choose students randomly.
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.
It is unclear based on the given information whether his conclusion is valid or not.
Statistics Basics Quick Check
4 of 54 of 5 Items
Question
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.
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.
Yes, because the sample includes all customers between the ages of 20 and 30.
Yes, because the sample includes male and female customers.
No, the conclusion is not valid as the sample only includes customers between the ages of 20 and 30, which is not representative of the entire population of people who own cell phones.
Statistics Basics Quick Check
4 of 54 of 5 Items
Question
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.
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.
Yes, because the sample includes all customers between the ages of 20 and 30.
Yes, because the sample includes male and female customers.
use the given answers
No, because the sample only represents a specific age group and may not be representative of the entire population of people who own cell phones. Additionally, the conclusion may be affected by self-selection bias as the survey was only sent to customers who may have certain preferences and behaviors.
Statistics Basics Quick Check
4 of 54 of 5 Items
Question
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
a. No, because the sample includes customers of too many different ages.
No, because the sample includes customers of too many different ages.
b. 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.
c.Yes, because the sample includes all customers between the ages of 20 and 30.
Yes, because the sample includes all customers between the ages of 20 and 30.
d. Yes, because the sample includes male and female customers.