Sampling Methods

OTHER SAMPLING TECHNIQUES

• Stratified Sampling– The population is divided into

strata or distinct groups. (freshman, sophomore,
junior, senior for example) Then a random sample is
drawn from each group or strata

Take SOME from ALL

•

Multiple Choice

Stratified Sampling can be remembered as ...

• Take ALL from some

• Take some from all

• Take all

• Take every nth

Multiple Choice

Which sampling method is an example of stratified sampling?

• Ms. Downs randomly selects 2 of her classes and surveys all students in those two classes.

• Ms. Downs randomly selects 3 students from each of her 5 classes.

• Ms. Downs writes all of her student's names on pieces of paper, tosses them in a hat and selects 20.

• Ms. Downs selects every 5th student who enters the classroom.

OTHER SAMPLING TECHNIQUES

• Systematic Sampling – Select a random starting

point and select every kth element for the sample

•

Multiple Choice

Systematic Sampling can be remembered as ...

• Take ALL from some

• Take some from all

• Take all

• Take every nth

Multiple Choice

Which sampling method is an example of systematic sampling?

• Ms. Downs randomly selects 2 of her classes and surveys all students in those two classes.

• Ms. Downs randomly selects 3 students from each of her 5 classes.

• Ms. Downs writes all of her student's names on pieces of paper, tosses them in a hat and selects 20.

• Ms. Downs selects every 5th student who enters the classroom.

OTHER SAMPLING TECHNIQUES

• Cluster Sampling –Divides the population into

clusters or sections. Randomly select n clusters.

Every member of the

chosen clusters are included in the sample.

Take ALL from SOME

•

Cluster Sampling

Multiple Choice

Cluster Sampling can be remembered as ...

• Take ALL from some

• Take some from all

• Take all

• Take every nth

Multiple Choice

Which sampling method is an example of cluster sampling?

• Ms. Downs randomly selects 2 of her classes and surveys all students in those two classes.

• Ms. Downs randomly selects 3 students from each of her 5 classes.

• Ms. Downs writes all of her student's names on pieces of paper, tosses them in a hat and selects 20.

• Ms. Downs selects every 5th student who enters the classroom.

OTHER SAMPLING TECHNIQUES

• Multistage Sampling – Divide the population into

cluster and then SRS from the clusters - repeat

A CENSUS is when you collect responses from the

entire population

Multistage Sampling

BAD

Simple Random Sample (SRS)

Stratified Sample

Systematic Sample

Cluster Sample

Multistage

Convenience

Voluntary Response

Sampling Methods

GOOD

Multiple Choice

Ohio has 607 school districts. In order to find out if a breakfast program is of interest, a random sample of 50 school districts will be chosen. Out of those districts chosen, 20 schools will be randomly selected and surveyed on interest in the program. This is an example of (blank) sampling.

• Cluster

• Multistage

• simple random

• systematic

Multiple Choice

What sampling method are you using if you survey every 5th person who enters the room.

• Convenience

• Systematic

• Simple Random

Multiple Choice

Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected.

• systematic

• simple random sample

• convenience

• Self - selected (volunteer)

Multiple Choice

Student government randomly samples 25 students from each of the four classes.

• stratified

• volunteer

• systematic

• simple random

Multiple Choice

Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.
This is a form of:

• Simple Random Sample

• Stratified Random Sample

• Voluntary Response

• Systematic Random Sampling

Multiple Choice

Ms. Downs wanted to know students' opinion on the new schedule at school. She placed all students' names in a hat and picked out 20 to survey. 

• Convenience Sampling

• Systematic Sampling

• SRS

• Volunteer response

Multiple Choice

A wholesale seafood business serves a city with three distinctly different market areas.

In order to decide where to locate retail markets, the

wholesaler randomly selects 10 stores in each of the markets and then surveys 30 randomly selected employees from each store.

• multistage

• systematic sampling

• cluster sampling

• convenience sampling

Multiple Choice

Ms. Downs samples her class by randomly selecting 5 girls and 7 boys from the 12 girls and 1o boys.  This type of sampling is called?

• Stratified

• Systematic

• Simple

• Cluster

Multiple Choice

A farmer want a sample of trees in his apple orchard. He selects the five trees closest to his barn.

• Convenience

• Systematic

• Stratified

• Simple Random

Multiple Choice

The president of a college randomly selects 2 students from each department to serve on a student advisory board.

• Convenience

• Systematic

• Stratified

• Simple Random

Multiple Choice

You observe the color of every third car in a parking lot.

• Convenience

• Systematic

• Stratified

• Simple Random

Multiple Choice

West Milford wants to survey its employees.  They pick 3 schools from the district and survey every single employee in each of the 3 buildings.

• cluster

• volunteer

• systematic

• simple random

Multiple Choice

A teacher hands out an index card and asks ALL of her students to write down the following information: age, height (in inches), and what grade they are in.

Which of the following best describes her method of data collection?

• Census

• Simple Random Sample

• Cluster Random Sample

• Stratified Random Sample

Multiple Choice

A teacher wants to know the average time spent doing homework by the students in her class.

She selects the first five who raise their hands.

• Systematic

• Convenience

• Volunteer Response

• Simple Random

Multiple Choice

To randomly select 25 basketball players from the 300 players in the NBA, I would: 

• Number the players from 01-25, read 3 digits at a time from a random table, discarding repeats and numbers over 25, and then stop when I reach 25.

• Select the first 25 players that are in the list of all players

• Number the players from 01-299, read 2 digits at a time from a random table, discarding repeats and numbers over 300, and stop when I reach 25.

• Number the players from 001-300, read 3 digits at a time from a random table, discarding repeats, 000 and numbers over 300, and stop when I reach 25.

Multiple Choice

Interview the first 30 students who enter the school in the morning. 

• simple random

• voluntary response

• systematic

• convenience

Multiple Choice

What type of Sampling?

You are interested in finding out the percent of residents in the city that have experienced a robbery in the past year. Using the city property records, you assign each residence a number. You use a random number generator to give you a list of numbers. You contact the residence that corresponds to that number to ask your questions.

• Random

• Stratified

• Systematic

• Cluster

Multiple Choice

What type of Sampling?

You want to know the average number of hours that high school seniors spend playing video games in your state. You randomly select 20 high schools in the state and then ask all the seniors at each of the 20 high schools about their video game habits.

• Random

• Stratified

• Systematic

• Cluster

Multiple Choice

What type of Sampling?

A restaurant owner wants to find out the average number of dishes ordered at each table served on Friday evenings, their busiest time. She decides to collect and analyze every fifth receipt of the night, starting at 6:00 p.m.

• Random

• Convenience

• Systematic

• Voluntary

Multiple Choice

Political webpages often allow readers to rate (if they want to) whether they strongly agree, agree, disagree, or strongly disagree with the President's decision on any given situation. This is a form of:

• Voluntary Response

• Convenience Sampling

• Simple Random Sampling

• Systematic Random Sampling

Drag and Drop

If you survey every third house on a street, what type of sampling technique are you using?

Placeholder

Drag these tiles and drop them in the correct blank above

Systematic

Cluster

SRS

Convenience

Drag and Drop

What type of sampling is this

Randomly select 4 counties in NJ and then survey all of the mayors in each county​

Placeholder

Drag these tiles and drop them in the correct blank above

Cluster

Systematic

Stratified

SRS

Match

Match the following

• Select every 5th student

• Readers choose to respond to a poll

• Number the players 1 - 1000 and use a random number generator to select 50

• Randomly select 6 stores from each of the states

• Survey all employees at 5 randomly selected stores

Systematic

Voluntary Response

SRS

Stratified

Cluster

• Systematic

• Voluntary Response

• SRS

• Stratified

• Cluster