250 people go to a soccer game. 4 people are picked to march in a victory parade. What is the sample?

Jessica is studying students at Commodore who play instruments. She surveys 75 students in the school. What is the population?

Mr. Martin wants to know if students prefer cheese or pepperoni pizza. He surveys 50 out of 900 students. What is the population?

Ms. Smyles randomly picks 2 students in the class to give a cookie. What is the sample?

Sameer surveys 15 students in his class to get ideas for his science project. What is the population?

A good sample must be: representative and random.

(Watch Mr. Jackson's video for help)

Which picture is a way to pick a random sample?

A good sample must be: representative and random.

(Watch Mr. Jackson's video for help)

Which picture shows a representative sample?

For a school project, three students need to produce a sample of students at their school. Which of the following methods leads to a random sample?

At a local golf club, there are 50 male members and 30 female members. A representative sample of 10 random male members and 6 random female members is chosen. Which of the following is the sampling method used?

involves simply asking anyone who happens to be there if they would like to participate.  For instance, asking students in the library if they would be willing to complete a survey.

Which of the following is an example of categorical data?

Which of the following is an example of a quantitative variable?

Look at each data set's standard deviation.

Set 1: 15.9

Set 2: 14.64

Set 3: 17.88

Which set of data has values that are closer in relation to the mean value of the data?

$f\left(x\right)=5x-12$ What is $f\left(-4\right)$

Identify the sampling method used in this situation. 

Select three JV and three Varsity basketball players to receive ice cream by putting the JV names in one hat and all the Varsity names in a different hat and picking out three names from each hat. 

A school chooses 3 randomly selected athletes from each of its sports teams to participate in a survey about athletics at the school. What kind of sampling technique is used?

Willy wants to find what percent of students at his school drink milk after they finish their cereal. He randomly selects 10 students from each grade level (freshmen, sophomore, and junior, senior). What type of sampling is this?

Group the businesses according to type: medical, shipping, retail, manufacturing, financial, construction, restaurant, hotel, tourism, other. Then select a random sample of 10 businesses from each business type. What kind of sampling techniques is this?

Mrs. Trahan samples her class by selecting 5 girls and 7 boys.  This type of sampling is called?

Farmer Joe separates his farm into 10 regions.  He then randomly selected 5 trees from each region to estimate the number of apples produced on his apple tree farm.  This is _____________ sampling.  

Calculate the number of parts for C

Calculate the number of parts for D

Calculate for dark choc

Calculate for white choc

Which sampling method divides the population into subgroups and takes samples from each subgroup?

Sampling method that in which the population is divided into HOMOGENEOUS groups and SRS’s are pulled from each group.

This type of sampling is called what?

A teacher conducting research on a statistical intervention decided to divide her students into age groups and then select students from each group.

The teacher samples her class by randomly selecting 5 girls and then randomly selecting 7 boys.  This type of sampling is called?

A researcher wants to ensure that both urban and rural populations are represented in a study about health behaviors. Which sampling method should the researcher use?

A sample in which members of the population are divided into two or more subsets called strata that share a common characteristic. The participants are then randomly selected from each group.

A population is divided into smaller groups that share a similar characteristic. A sample is then randomly selected from each group.

when a population is divided into groups with similar characteristics and a sample is randomly chosen from each group

What is stratified sampling?

Which of the following surveying methods divides individuals by a shared attribute, then randomly surveys members within each attribute-group?

How does stratified sampling improve the accuracy of the sample results?

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

Which of the following is an advantage of stratified sampling over simple random sampling?

What type of sampling is shown here?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

Units of the population are grouped; one or more groups are selected at random.  All units of that group are included in the sample.

Identify the sampling design: SCPS wants to survey its employees.  They pick 4 schools from the county and survey every single employee in each of the 4 buildings.

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

____________ selects a sample by randomly choosing clusters and including each member of the selected clusters in the sample.

What is cluster sampling?

Which sampling method divides the population into clusters and takes samples from each cluster?

When a population is divided into convenient clusters, and entire clusters are chosen at random as the sample.

population is divided into clusters and entire clusters are chosen as the sample

Which of the following surveying methods involves randomly selecting groups of individuals, then surveys all individuals in the group?

Students at North River High School are assigned to home rooms with 25 students each. You randomly select 4 homerooms and gather data from each of the 100 students in these classes.

What type of sampling method was used?

To select a cluster sample, divide a population into groups, then select all the members in some of the groups.

The teacher samples her class by selecting all students sitting at table 1 and table 5 in her classroom.  This sampling technique is called?

What type of sampling is shown?

What type of sampling is shown?

What type of sampling is shown?

Willy wants to find what percent of students at his school drink milk after they finish their cereal. He randomly selects 3 classrooms and surveys every student in those classrooms. What type of sampling is this?

The principal randomly selects four classes and surveys each student in those classes. What kind of sampling technique is used?

Lana and Jeff each randomly surveyed 15 students about their favorite types of movies. What would you expect to see in the samples? Select all that apply.

The principal at Marina Middle School wants to determine if the 120 students in the seventh grade prefer to visit Catalina Island or Camp Mosaic for their end-of-year trip. Which of the following is a representative sample of the population? Select all that apply.

The city council in Middlefield wants to know if residents are in favor of a traffic camera at the main intersection in town. Which example is likely to produce a representative sample?

Students in Mrs. Walsh’s math class wanted to know the favorite snacks of students in the school. How could they generate a random sample to survey?

Vanessa’s class is studying the number of car commercials on television between 6 p.m. and 8 p.m. for five days. Which is the best sample for Vanessa to use?

Trevor's science class is studying the rainfall on the first day of each month for one year. Explain why studying the rainfall on the first day of​ September, October, and November is not a random sample.

To predict the performance of her first period class on their next quiz, a teacher randomly selects eight students from the class and takes the mean of their scores on the last quiz. Is this sample representative of the​ class's performance on the quiz?

To try to predict the outcome of the vote for the school board election school board election​, a town manager used random numbers to pick 100 registered voters. She then called these voters and asked how they planned to vote. Is the sample taken in this problem representative of the population?

A movie theater considers upgrading to offer luxury seating. The manager randomly surveys​ 1,200 residents who live within 10 miles of the theater. What is the sample in this​ situation?

You want to study a random sample of 4 out of 26 students in your class. Describe a process you could use to create a random sample with 4 subjects.

Trinity is researching which movies people in her town are watching. She stands outside of the movie theater to survey people. Which method below would be systematic sampling?

Which of the following are systematic sampling? (Choose all that apply)

You are researching the favorite foods of the 20 students in your math class. Which of the following could represent the first 3 students you choose in a systematic sample?

While studying the heights of students in the 7th grade, you have students line up in alphabetical order and measure every 4th student. Would your results be a representative sample of the class?

The trees in a park form a line through the center in a pattern. The trees repeat in the order of elm, spruce, willow, pine, and birch. You decide to take a systematic sample using an interval of every 6th tree. In all there are 150 trees. How many pine trees do you estimate are in the park?

Which are systematic sampling?

Which could represent the first 3 building chosen in a systematic sample of a city block?

At a hardware store, cans of paint are displayed in a repeated order of yellow, red, purple, orange, green, blue. You take a systematic sample in intervals of 5 cans, starting with the 2nd can. There are 150 cans on display. Estimate how many cans of green paint are on display.

Sporting Illustrated collects data on its readers by asking them to fill out and send in a survey from the June issue.

A group of lobbyists has a list of 100 senators. They decide to talk to every 7th senator on the list about their position on farm subsidies.

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.

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:

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.

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.

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 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?

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.

State the type of sample.

A radio station asks its listeners to call in their opinion regarding the use of American forces in peacekeeping missions.

A political polling group is interested in learning about the proportion of registered voters who favor a particular candidate for mayor. Which of the following sampling plans may have introduced bias?

Which of the following doesn’t result in some form of bias?

A department store mails a customer satisfaction survey to people who make credit card purchases at the store. This month, 45,000 people made credit card purchases. Surveys are mailed to 1000 of these people, chosen at random, and 137 people return the survey form. Identify the population and the sample.