Which of the following survey methods should wholesome company use to make a valid conclusibout the percentage of students at Jefferson high school who like

Question

Wholesome company has been hired to design a healthy menu for lunch at Jefferson high school. They want to conduct a survey to determine what percentage of Jefferson's 750 students like carrots. the survey will ask, "do you like carrots.

Which of the following survey methods should wholesome company use to make a valid conclusion about the percentage of students at Jefferson high school who like carrots.

 

Select all that apply: 

first choice: ask every student at Jefferson high school

second choice: ask all the students in the salad bar line during lunchtime for one week

third choice: ask all students on the football team 

Fourth Choice: assign a number to each stUsenet and use a computer program to generate 100 different random numbers between 1 and 750. Ask those numbers whose number was selected 

 

round all decimals answers to 3 decimals places if necessary 

Answer 1

Hi Azza,

 

Choices 2 and 3 are poor choices. This is because these samples would not be random. There are be systematic differences between salad bar students, athletes and the rest of the students that affect their love for carrots.

 

Choice 4 is a good choice because this method will result in a random, and hopefully representative, sample of students.

 

Choice 1 is also a good choice because, by including all of the students, we no longer have to worry about sampling error. However, it may be very difficult or costly to include every single student.

 

So choices 1 and 4 are the most valid sampling methods depending on how difficult it is to include every student.