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Deanna Hettinger
Deanna HettingerLv2
21 Feb 2019
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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

Which sample fairly represents the population? check all that apply

A) Measuring the heights of every fiftieth person on the school roster to determine the average heights of the boys in the school.
 
B) Calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment.
 
C) Observing every person walking down the main street at 5 p. m. one evening to determine the percentage of people who wear glasses.
 
D) Sending a confidential e-mail survey to every one-hundredth parent in the school district to determine the overall satisfaction of the residents of the town.
 
E) Taking a poll in the lunchroom (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch.

Which sample fairly represents the population? Check all that apply.

1) measuring the heights of every fiftieth person on the school roster to determine the average heights of the boys in the school.

2) calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment observing every person.

3) walking down Main Street at 5 p.m. one evening to determine the percentage of people who wear glasses.

4) sending a confidential e-mail survey to every one-hundredth parent in the school district to determine the overall satisfaction of the residents of the town.

5) taking a poll in the lunchroom (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch

Assume that when adults with smartphones are randomly​ selected, 55​% use them in meetings or classes. If 8 adult smartphone users are randomly​ selected, find the probability that exactly

2 of them use their smartphones in meetings or classes. The probability is nothing . ​(Round to four decimal places as​needed.)

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