The population describes:

The group of people being surveyed

part of the group being surveyed

Unbiased sampling is:

when any member of the population is equally likely to be chosen for the sample

when you choose the group you think will represent the sample

when you choose a population that is more likely to give you the result you want

when you choose a group that is equally likely to be chosen

Devon polled 642 drivers late on a Friday night. Is this a random sample of the drivers in the city?

No, because this only represents people late on a friday night

Yes because this represents all the drivers in the city well.

Dylan wants to know how the students at his school rate the cafeteria. He surveyed his school's basketball team to rate the school cafeteria. Is this a biased sample of the school's population?

Yes, because it is a convenience survey

No, the basketball team has the smartest students

Yes, because it's voluntary survey

No, he should have asked the football team

If I wanted to know how many blades of grass are inside the track, which sampling method could I use?

Divide the grassy area into 1 inch sections, randomly pick several sections to count, average them together and multiply that by the total square inches.

Have my students count every blade of grass

You want to know what is the most favorite sport of 7th graders at BMS. You ask 7th graders who want to participate to go to the office 5th period to complete a survey. This is...

Biased because it is a volunteer sample

Biased, because it is a convenience sample

Biased because it is an interval sample

The population describes:

The group of people, objects or events being surveyed

a part of the group being surveyed

At a middle school, the 7th graders will conduct a survey to decide where they want to go on a field trip. Which method will result in the least biased decision?

to randomly choose some 7th grade students to select a location

to randomly ask 8th grade students who went on a field trip last year

to ask all 7th grade teachers and administrators for a location

to ask the student council to choose a location

Unbiased sampling is:

when any member of the population is equally likely to be chosen for the sample

when you choose the group you think will give you the answer you want, accept volunteers or survey by convenience

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?

The sample didn't include students.

The sample can only be accurate if each teacher is included in the sample

sampling - random/biased/representative

Authored by Corie Misko

Mathematics

7th Grade

CCSS covered

Used 15+ times

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34 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Susan polled 587 people throughout each city in her county. Each city is the same size. Is this sample of the residents of cities in the county likely to be biased?

yes

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Eric surveyed 402 employees at the company who worked in Marketing. Is this a random sample of the employees at the company in general?

yes

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Josie threw a handful of identically shaped buttons into the air, then collected the 27 buttons that landed in a target on the floor. Is this a random sample of the buttons?

yes

Tags

CCSS.7.SP.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Leslie surveyed the 9 youngest students in the elementary school. Is this sample of the students in the school likely to be representative?

yes

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Henry surveyed the first 7 celebrities to arrive at the movie premiere. Is this sample of celebrities likely to be biased?

yes

Tags

CCSS.7.SP.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Suzie examined 7 flowers in each planter at the mall. Each planter has an equal number of flowers. Is this sample of the flowers at the mall likely to be representative?

yes

Tags

CCSS.7.SP.A.1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Patrick polled the first 27 people to attend the WMS band concert. Is this sample of the concert attendees likely to be representative?

yes

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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sampling - random/biased/representative

Susan polled 587 people throughout each city in her county. Each city is the same size. Is this sample of the residents of cities in the county likely to be biased?

Eric surveyed 402 employees at the company who worked in Marketing. Is this a random sample of the employees at the company in general?

Josie threw a handful of identically shaped buttons into the air, then collected the 27 buttons that landed in a target on the floor. Is this a random sample of the buttons?

Leslie surveyed the 9 youngest students in the elementary school. Is this sample of the students in the school likely to be representative?

Henry surveyed the first 7 celebrities to arrive at the movie premiere. Is this sample of celebrities likely to be biased?

Suzie examined 7 flowers in each planter at the mall. Each planter has an equal number of flowers. Is this sample of the flowers at the mall likely to be representative?

Patrick polled the first 27 people to attend the WMS band concert. Is this sample of the concert attendees likely to be representative?

A teacher examined 17 different tests from each of her math classes. Each class had the same number of tests. Is this sample of the tests likely to be biased?

Colton polled 22 people at the town senior center. Is this a random sample of the town residents?

Karen surveyed the first seven shoppers at the produce stand. Is this sample of shoppers at the produce stand likely to be biased?

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