Complete the statement: You can reduce sampling error by _____________

keeping the sample size the same

repeating the survey over and over with the same sample

What is voluntary bias?

when people volunteer to be in the sample

when some groups in the population are left out of the sampling process

when you try to pick out random people to include in the sample without using an appropriate probability method

when the sample is chosen because it's easy to obtain

Harold has decided to conduct a survey to find out how many students like seafood. Using stratified random sampling; tell Harold how to pick out 30 subjects for the survey.

First, divide students in the school into groups of what they eat for lunch. Then we use a random number table to take a relative amount of people (relative to the size of each group), making sure that we will end up with 30 subjects in the end.

First, make a list of students in the school, and number each possible subject. Next, using a random number table, pick out in order any number between 1 and the number of students in the school. Continue picking out numbers until you have 30 subjects. Ignore any numbers that are out of range in the table.

First, make a list of students in the school. Next, we'll divide the number of students in the school by 30 to figure out how far to space out our choices. Next, use a random number table to pick our first subject. From that subject, count out the same amount each time (the number of students in the school divided by 30) until we have 30 subjects.

First, divide students in the school into groups based upon Lunchtime. Then we randomly pick a few groups of Lunchtime to choose our sample from. Randomly (using a random number table), we pick out the same amount from each Lunchtime so that we end up with a sample of 30 subjects.

What is stratified random sample?

The population is divided into groups, and subjects are chosen randomly from each group

The population is divided into groups, and only a few groups are used to select the subjects

Each sample of the size we want is equally likely

The population is listed out then divided up using a rule (where only the 1st person is chosen randomly)

Erin has decided to conduct a survey to find out the number of blue shirts students own. Using simple random sampling; tell Erin how to pick out 20 subjects for the survey.

First, make a list of students in the school, and number each possible subject. Next, using a random number table, pick out in order any number between 1 and the number of students in the school. Continue picking out numbers until you have 20 subjects. Ignore any numbers that are out of range in the table.

First, divide students in the school into groups of Gym class. Then we randomly pick a few groups based upon Gym class to choose our sample from. Randomly (using a random number table), we pick out the same amount from each Gym class so that we end up with a sample of 20 subjects.

First, make a list of students in the school. Next, we'll divide the number of students in the school by 20 to figure out how far to space out our choices. Next, use a random number table to pick our first subject. From that subject, count out the same amount each time (the number of students in the school divided by 20) until we have 20 subjects.

First, divide students in the school into groups of their clicks (preppy, hip, etc). Then we use a random number table to take a relative amount of people (relative to the size of each group), making sure that we will end up with 20 subjects in the end.

What are the advantages of a cluster random sample?

saves travel time and money, and is useful when surveying employees, or students where they are already in convenient groups

spreads the sample more evenly over the population and relatively easy to conduct

when done appropriately, it is a good method to use, convenient, and ensures pretty good coverage of the population

What is Qualitative data?

Categorizes each individual respondent. Averages are meaningless.

Data takes on numeric values, and averages are meaningless.

Data takes on numeric values, and averages have meaning.

Categorizes each individual respondent. Averages have meaning.

Is this qualitative or quantitative and why? The weight of a group of 3 mail-carriers

Quantitative. The data takes on numeric values and an average makes sense.

Qualitative. The data takes on numeric values and an average makes sense.

Quantitative. The data categorizes each individual respondent. Averages are meaningless.

Qualitative. The data categorizes each individual respondent. Averages are meaningless.

Is this a sample or a population and why? All blue trucks.

Population. This represents the whole set we are interested in knowing more about.

Sample. This represents the whole set we are interested in knowing more about.

Population. This represents a subset of the group that we are interested in knowing more about.

Sample. This represents a subset of the group that we are interested in knowing more about.

A study determined that 79% of 1300 people surveyed watched the premier of a tv show. What is 79%? A parameter or a statistic and why?

Statistic. It's a numerical summary of a sample.

Parameter. It's a numerical summary of a sample.

Parameter. It's a numerical summary of a population.

Statistic. It's a numerical summary of a population.

60% of students out of 1400 surveyed planned to go to college right after high school. What is the percent of all students who plan to go to college right after high school.? A parameter or a statistic and why?

Parameter. It's a numerical summary of a population.

Parameter. It's a numerical summary of a sample.

Statistic. It's a numerical summary of a sample.

Statistic. It's a numerical summary of a population.

A study determined that 79% of 1400 people surveyed watched the premier of a tv show. What is the percent of all people surveyed who watched the premier? A parameter or a statistic and why?

Statistic. It's a numerical summary of a sample.

Parameter. It's a numerical summary of a population.

Parameter. It's a numerical summary of a sample.

Statistic. It's a numerical summary of a population.

67% of students out of 1700 surveyed planned to go to college right after high school. What is the percent of all students surveyed who plan to go to college right after high school.? A parameter or a statistic and why?

Statistic. It's a numerical summary of a sample.

Parameter. It's a numerical summary of a population.

Parameter. It's a numerical summary of a sample.

Statistic. It's a numerical summary of a population.

AP Stats Collecting Data 8/24/18

Mathematics

10th - 12th Grade

CCSS covered

Used 59+ times

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30 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A satellite orbiting Earth keeps track of how
much rain falls in different cities. What are the
subjects in this census?

people

cities

Earth

rain

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When is it bad to use a census?

When time, money, or resources make it

hard to observe an entire population.

When a sample is smaller.

When time, money, or resources make it

easy to observe an entire population.

When time, money, or resources make it

hard to observe a sample of the population.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a population?

the part of the population we examine

the treatment

what you apply the treatment to

everyone

Tags

CCSS.HSS.IC.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A survey is conducted to see how many children
people have. What is the population in this
sample survey?

all people

children

llamas

married couples

Tags

CCSS.HSS.IC.A.1

CCSS.7.SP.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Opal wants to find out how much money
students spend at the grocery store, so Opal
interviews people at a local mall. Which type of
sampling is this?

stratified sampling

convenience sampling

simple random sampling

volunteer sampling

Tags

CCSS.HSS.IC.B.3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Heather wants to find out whether people
should get abortions, so Heather has a preacher
give out contact information for people
interested in whether people should get
abortions, and having the preacher asks anyone
who had an opinion to take part in Heather's
survey. Which type of sampling is this?

convenience sampling

stratified sampling

volunteer sampling

simple random sampling

Tags

CCSS.HSS.IC.A.1

CCSS.7.SP.A.1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Eugene wants to find out how many people like
seafood, so Eugene divides the group of people
by their taste in music, and then randomly
choose people from each music group to make
the whole sample. Which type of sampling is
this?

stratified sampling

volunteer sampling

simple random sampling

convenience sampling

Tags

CCSS.HSS.IC.B.3

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AP Stats Collecting Data 8/24/18

A satellite orbiting Earth keeps track of howmuch rain falls in different cities. What are thesubjects in this census?

When is it bad to use a census?

What is a population?

A survey is conducted to see how many childrenpeople have. What is the population in thissample survey?

Opal wants to find out how much moneystudents spend at the grocery store, so Opalinterviews people at a local mall. Which type ofsampling is this?

Heather wants to find out whether peopleshould get abortions, so Heather has a preachergive out contact information for peopleinterested in whether people should getabortions, and having the preacher asks anyonewho had an opinion to take part in Heather'ssurvey. Which type of sampling is this?

Eugene wants to find out how many people likeseafood, so Eugene divides the group of peopleby their taste in music, and then randomlychoose people from each music group to makethe whole sample. Which type of sampling isthis?

Complete the statement:You can reduce sampling error by_____________

April wants to find out the number of blue shirtspeople own. April has a very strong opinion onthis subject and gets angry at people who don'tagree. Which type of bias is this?

What is voluntary bias?

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Discover more resources for Mathematics

A satellite orbiting Earth keeps track of how
much rain falls in different cities. What are the
subjects in this census?

A survey is conducted to see how many children
people have. What is the population in this
sample survey?

Opal wants to find out how much money
students spend at the grocery store, so Opal
interviews people at a local mall. Which type of
sampling is this?

Eugene wants to find out how many people like
seafood, so Eugene divides the group of people
by their taste in music, and then randomly
choose people from each music group to make
the whole sample. Which type of sampling is
this?

Complete the statement:
You can reduce sampling error by
_____________

April wants to find out the number of blue shirts
people own. April has a very strong opinion on
this subject and gets angry at people who don't
agree. Which type of bias is this?