Question

(a) A botanist at a nursery wants to inspect the health of the plants at the nursery. Which of the following best describes a random sample of plants? All of the plants that are in one particular room at the nursery are easily accessible. So, the botanist selects the 78 plants in this particular room. The botanist forms groups of 13 plants based on the heights of the plants. Then, he randomly chooses 6 groups and selects all of the plants in these groups. The botanist assigns each plant a different number. Using a random number table, he draws 78 of those numbers at random. Then, he selects the plants assigned to the drawn numbers. Every set of 78 plants is equally likely to be drawn using the random number table. (b) The organizers of a conference want to survey attendees about the registration fee. Which of the following best describes a stratified sample of attendees? The organizers assign each attendee a different number. Using a random number table, the organizers draw 60 of those numbers at random. Then, the organizers select the attendees assigned to the drawn numbers. Every set of 60 attendees is equally likely to be drawn using the random number table. The organizers form 5 groups of attendees based on the attendees' employment statuses. Then, the organizers select 12 attendees at random from each group. The organizers form groups of 12 attendees based on the day the attendees registered. Then, the organizers randomly choose 5 groups and select all of the attendees in these groups. (C) Counselors at a college want to poll students about how much time the students spend studying. Which of the following best describes a convenience sample of students? The students living in a particular dorm building on campus are easily accessible. So, the counselors select the 50 students living in that particular dorm building. The counselors take a list of the students and select every 5th student until 50 students are selected. The counselors form 2 groups of students based on the numbers of classes the students are taking. Then, the counselors select 25 students at random from each group

(a) A botanist at a nursery wants to inspect the health of the plants at the nursery. Which of the following best describes a random sample of plants?
All of the plants that are in one particular room at the nursery are easily accessible. So, the botanist selects the 78 plants in this particular room.
The botanist forms groups of 13 plants based on the heights of the plants. Then, he randomly chooses 6 groups and selects all of the plants in these groups.
The botanist assigns each plant a different number. Using a random number table, he draws 78 of those numbers at random. Then, he selects the plants assigned to the
drawn numbers. Every set of 78 plants is equally likely to be drawn using the random number table.
(b)
The organizers of a conference want to survey attendees about the registration fee. Which of the following best describes a stratified sample of attendees?
The organizers assign each attendee a different number. Using a random number table, the organizers draw 60 of those numbers at random. Then, the organizers select
the attendees assigned to the drawn numbers. Every set of 60 attendees is equally likely to be drawn using the random number table.
The organizers form 5 groups of attendees based on the attendees' employment statuses. Then, the organizers select 12 attendees at random from each group.
The organizers form groups of 12 attendees based on the day the attendees registered. Then, the organizers randomly choose 5 groups and select all of the attendees in
these groups.
(C)
Counselors at a college want to poll students about how much time the students spend studying. Which of the following best describes a convenience sample of students?
The students living in a particular dorm building on campus are easily accessible. So, the counselors select the 50 students living in that particular dorm building.
The counselors take a list of the students and select every 5th student until 50 students are selected.
The counselors form 2 groups of students based on the numbers of classes the students are taking. Then, the counselors select 25 students at random from each group

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