f students? The students living in a particular dorm building on campus are easily accessible. So, the counselors select the 72 students living in that particul. dorm building. The counselors take a list of the students and select every 3 student until 72 students are selected. O The counselors form 6 groups of students based on the numbers of classes the students are taking. Then, the counselors select 12 students at ra from each group. O A facilities supervisor at a sports stadium wants to rate the condition of the seats at the stadium. Which of the following best describes a convenience sample of seats? All of the seats in the VIP section are easily accessible. So, the supervisor selects the 90 seats in this section. O The supervisor uses a computer program to draw 90 seats at random and selects these seats. Every set of 90 seats is equally likely to be drawn by computer program. O The supervisor forms groups of 30 seats based on the sections the seats are in. Then, she selects all of the seats in 3 randomly chosen groups. (c) The organizers of a conference want to survey attendees about the registration fee. Which of the following best describes a cluster sample of attendees? The organizers form 7 groups of attendees based on the attendees' employment statuses. Then, the organizers select 8 attendees at random from each group. The organizers form groups of 8 attendees based on the day the attendees registered. Then, the organizers randomly choose 7 groups and select all of the attendees in these groups.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Classifying samples
(a) Counselors at a college want to poll students about how much time the students spend studying. Which of the following best describes a stratified sample
of students?
The students living in a particular dorm building on campus are easily accessible. So, the counselors select the 72 students living in that particular
dorm building.
O The counselors take a list of the students and select every 3" student until 72 students are selected.
O The counselors form 6 groups of students based on the numbers of classes the students are taking. Then, the counselors select 12 students at random
from each group.
(b) A facilities supervisor at a sports stadium wants to rate the condition of the seats at the stadium. Which of the following best describes
sample of seats?
convenience
All of the seats in the VIP section are easily accessible. So, the supervisor selects the 90 seats in this section.
O The supervisor uses a computer program to draw 90 seats at random and selects these seats. Every set of 90 seats is equally likely to be drawn by the
computer program.
O The supervisor forms groups of 30 seats based on the sections the seats are in. Then, she selects all of the seats in 3 randomly chosen groups.
(c) The organizers of a conference want to survey attendees about the registration fee. Which of the following best describes a cluster sample of attendees?
The organizers form 7 groups of attendees based on the attendees' employment statuses. Then, the organizers select 8 attendees at random from
each group.
The organizers form groups of 8 attendees based on the day the attendees registered. Then, the organizers randomly choose 7 groups and select all of
the attendees in these groups.
The organizers take a list of the attendees and select every 7" attendee until 56 attendees are selected.
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Expert Solution

Step 1

Q1)

option c) is correct.

The counselor forms 6 groups of students based on the number of classes the students are taking. Then, the counselor select 12 students ar random from eac group.

Q2)

Option a) is correct.

All of the seats in the VIP section are easily available. So, the supervisor selects the 90 seats in the section.

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