Compare a population and a sample. Use definitions in your notes to support your answer.
Four hundred mice were collected in Virginia Beach. The 400 mice would represent a
Sample
Parameter
Population
Statistic
The weights of all of the students at Virginia Tech were collected. These students would represent a
Population
Parameter
Statistic
Sample
Mrs. Boyd want to find out how many of her students enjoyed Geometry in the past 5 years. Which choice best represents a sample that would give accurate data?
A selection of students who got an A in the class.
A selection of random students who were in Mrs. Boyd's geo class by using a random number generator.
All of the more than 1000 students to whom she has taught Geometry.
Go to the library during lunch and find former students to survey.
A record label wanted to see if people in New Hampshire liked their new logo. Which choice best represents a population?
4,000 retired adults 65 and older.
Every person in New Hampshire.
A selection of people from different cities in New Hampshire.
A selection of logo artists.
5000 emails were sent to former Ocean Lakes Students to determine their opinion on their school experience. 450 students responded to the survey. This is an example of
response bias
voluntary response bias
nonresponse bias
undercoverage bias
Dave conducted two different surveys about student engagment in school. For Survey A, he stood at the entrance of the library prior to lunch and surveyed the first 20 students. For Survey B, he used a random number generator to select 20 students in the school to survey.
What would be the better survey?
Survey A
Survey B
A high school guidance counselor wants to know what percentage of students have tried marijuana (in any form). He sends out an email to 350 randomly chosen students and asks them if they have tried marijuana. Of the 123 that responded, 4% said that they tried marijuana.
Describe the nonresponse bias
only 123 out of 350 students responded
people would have lied about their answers
they are dealing with undercoverage
A high school guidance counselor wants to know what percentage of students have tried marijuana (in any form). He sends out an email to 350 randomly chosen students and asks them if they have tried marijuana. Of the 123 that responded, 4% said that they tried marijuana.
Describe the response bias
only 123 out of 350 students responded
people would have lied about their answers
they are dealing with undercoverage
A high school guidance counselor wants to know what percentage of students have tried marijuana (in any form). He sends out an email to 350 randomly chosen students and asks them if they have tried marijuana. Of the 123 that responded, 4% said that they tried marijuana.
based on the sample info...the 4% who responded that they tried marijuana would be 'lower or higher' than the actual results, had the sample been taken more accurately and without bias.