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 | PrivacyO STATISTICS Classifying samples Infinity lost tomb b groups of passerigers based out lever or els choms are on. Men, Ty Accus Ty proengers at random from each group. O The host selects the first 78 passengers who board because these passengers are easily accessible. (c) 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 systematic sample of seats? The supervisor uses a computer program to draw 54 seats at random and selects these seats. Every set of $4 seats is equally likely to be drawn by the computer program. O The supervisor takes a list of the seats and selects every 6 seat until 54 seats are selected. O The supervisor forms 6 groups of seats based on the dates the seats were last replaced. Then, she selects 9 seats at random from each group. X Explanation Chock 0COM Mahow Hil Education All Rights Pokaneed Tommie the | Theky | Arrab O