Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

The student council at a local high school is collecting data to determine the top ten favorite songs of the students in the school. Which of the following methods represents stratified sampling?

Which sampling method is this?

To sample Falmouth High School students, each classroom number was put into a hat and students drew three rooms and surveyed every student in those classes.

What sampling method are you using if you survey every 12th customer that enters the amusement park.

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:

Why do we randomly select our samples?

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She selects the five closest to her desk.

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

A teacher wants to know how well her students are doing on a topic. She randomly picks one class and surveys all students in that class.

A sound engineer wants to test the audio quality in an auditorium at various distances from the on-stage speakers. She selects two seats at random from each row and surveys audience members in those seats. This is an example of a

Marianne wanted to know students' opinion on the new schedule at school. She places all students' names in a container and picks out 20 to survey. 

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

Why do we randomly select our samples?

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the first five who raise their hands.

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She picks the student in every 5th seat.

Interview every 10th student who enters the school in the morning.

Identify the sampling technique used:

Corn is planted on a 200-acre field. The field is divided into 10-acre subplots. A sample of plants is taken from each subplot to estimate the harvest.

A random number generator is used to select 12 students from a large statistics class to rate a statistics video. The 12 students selected are

Identify the sampling technique used:

Questioning students as they left school, a researcher asked 123 students about how they felt about the coming hurricane.

An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 1 block and survey all households on that block.

This is an example of:

A teacher splits her classes up by period. She then randomly picks 3 students from each period to do a survey.

A teacher wants to know how well her students are doing on a topic. She randomly picks one class to survey.

Identify the sampling design: The LFCC registrar wants to investigate attitudes of their graduates.  The registrar randomly selects 100 names from each of the four past graduating classes.

A teacher puts all her students' names in hat, then selects 3 names from the hat. These students will take a standardized test.

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

If you choose 5 bingo balls from a basket of 50 balls, what sampling technique are you using?

State the type of sample.

In order to determine the average IQ of ninth-grade students, a school psychologist obtains a list of all schools in the local public school system. She randomly selects five of these schools and administers an IQ test to all ninth-grade students at the selected schools.

Which of the following samples matches to the given picture?

(SRS = Simple Random Sample, STR = Stratified Sample, CLS = Cluster Sample, SYS = Systematic Sample, CON = Convenience Sample)

Which of the following samples matches to the given picture?

(SRS = Simple Random Sample, STR = Stratified Sample, CLS = Cluster Sample, SYS = Systematic Sample, CON = Convenience Sample)

Which of the following samples matches to the given picture?

(SRS = Simple Random Sample, STR = Stratified Sample, CLS = Cluster Sample, SYS = Systematic Sample, CON = Convenience Sample)

Which of the following samples matches to the given picture?

(SRS = Simple Random Sample, STR = Stratified Sample, CLS = Cluster Sample, SYS = Systematic Sample, CON = Convenience Sample)

Which of the following samples matches to the given picture?

(SRS = Simple Random Sample, STR = Stratified Sample, CLS = Cluster Sample, SYS = Systematic Sample, CON = Convenience Sample)

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.

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.

What type of Sampling?

An auto analyst is conducting a satisfaction survey, sampling from a list of 10,000 new car buyers. The list includes 2,500 Ford buyers, 2,500 GM buyers, 2,500 Honda buyers, and 2,500 Toyota buyers. The analyst selects a sample of 400 car buyers, by randomly sampling 100 buyers of each brand.

What type of Sampling?

Every fifth person boarding a plane is searched thoroughly.

What type of Sampling?

At a local community college, five math classes are randomly selected out of 20 and all of the students from each class are interviewed.

What type of Sampling?

A researcher randomly selects and interviews fifty male and fifty female teachers.

What type of Sampling?

A researcher for an airline interviews all of the passengers on five randomly selected flights.

You want to take a simple random sample of 50 of the 816 students who live in a dormitory ​on campus. You label the students 001 to 816 in alphabetical order. In the table of random digits, you read the entries:

95592 94007 69769 33547 72450 16632 81194 14873

The first three students in your sample have labels

Identify the sampling method:

The names of 70 contestants are written on 70 cards, The cards are placed in a bag, and three names are picked from the bag.

If you have 1,000 schools on the list, number them from 000 to 999 and read the table three digits at a time. What are the first five schools in this sample? Hint: You don't need to really look at the table to see the correct answer

A Statistics student did a research on the time spent by Grade 12 students playing video game. He selected the subjects by using the Table of Random Numbers. What technique is used?

In the stratified sampling, you randomly choose sample from several groups.