Course Home Syllabus Content Activities and Assessments v Grades My Tools . Academic Support Table of Contents > ALEKS , McGraw Hill Campus McGraw Hill Campus O STATISTICS Infin Classifying samples (a) A chemist at a pharmaceutical company wants to test the quality of a new batch of microscopes. Which of the following best describes a duster sample of microscopes? The microscopes in the first shipment that was received are easily accessible. So, he selects all 90 of the microscopes in this shipment. The chemist forms groups of 30 microscopes based on the laboratories that the microscopes are in, Then, he randomly chooses 3 groups and selects all of the microscopes in these groups. O The chernist takes a list of the microscopes and selects every 5 microscope until 90 microscopes are selected. [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 select the first 72 attendees who register for the conference because these attendees are easily accessible. O The organizers form groups of 8 attendees based on the day the attendees registered. Then, the organizers randomly choose 9 groups and select all of the attendees in these groups. O The organizers form 6 groups of attendees based on the attendees' employment statuses. Then, the organizers select 12 attendees at random from each group. fel Counselors at a pullone want to noll students about how much time the students enand studing Which of the following hast decor bec a Explanation Chock 0 7031 MoGnaw Hill Education All Rights Reserved. Terms of Use | PrivacyMcGraw Hill Campus In Classifying samples us and selects all of the microscopes in these groups. The chemist takes a list of the microscopes and selects every $ microscope until 20 microscopes are selected. (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 select the first 72 attendees who register for the conference because these attendees are easily accessible. The organizers form groups of & attendees based on the day the attendees registered. Then, the organizers randomly choose 9 groups and select all of the attendees in these groups. The organizers form 6 groups of attendees based on the attendees' employment statuses. Then, the organizers select 12 attendees at random from each group. (c) Counselors at a college want to poll students about how much time the students spend studying. which of the following best describes a systematic sample of students? The counselors take a list of the students and select every 6 student until 60 students are selected. The counselors use a computer program to draw 60 students at random and select these students. Every set of 60 students Is equally likely to be drawn by the computer program. O The counselors form 5 groups of students based on the numbers of classes the students are taking. Then, the counselors select 12 students at random from each group. Explanation Chock
