Random Sampling Methods

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?

• Numbering all the students and produce the sample from a random list of numbers

• Calling for volunteers at the school assembly

• Calling for volunteers via social media

• Asking each of their friends to name three further friend2

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

An elementary school principal wants to evaluate the teaching quality of the school by collecting data from a sample of students. Which of the following is not a suitable stratum to be used to collect the sample?

• gender

• grade level

• race

• first name

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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?

• simple random sampling

• systematic random sampling

• stratified sampling

Tags

CCSS.HSS.IC.B.3

Poole wants to know how students at OV rate the school lunch. I surveyed my IB Psych class to rate the food. Is this a biased sample of the school's population?

• Yes because it is a convenience sample. The sample is asking a very specific group that may not accurately match the population.

• No, the IB Psych class has the smartest students and the best foodies.

• Yes, because it is a voluntary survey that only interested students took.

• No, Poole should have asked the culinary class since have more experience with food.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

You want to know what is the favorite sport for Sophomores at OVHS. You ask 10th graders who want to participate to go to the office during their lunch period to complete a survey. This is...

• Biased, no one likes sports.

• Biased, people were randomly selected.

• Unbiased.

• Biased, it is a volunteer sample, meaning only interested people complete the survey.

Tags

CCSS.HSS.IC.B.3

To find out what sort of events they should plan, the student government officers at OVHS send a survey to 40 students, 10 in each grade, whose names were randomly selected. The population they are interested in is...

• only the 30 OVHS students

• all students at OVHS

• only students who respond to the survey

• all high school students in HB

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

For a class assignment, Tyler will conduct a survey to find out what students like to do after school. He asks the first 30 people he sees in the gymnasium before school what they like to do after school. Which statement correctly explains whether Tyler's sample is a random sample?

• Tyler's sample is not random because he only asks 30 people

• Tyler's sample is random because he asks only the first 10 people he sees

• Tyler's sample is not random because he asks people in a gymnasium, which could skew his results to sports

• Tyler's sample is random because he asks each person the same question

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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.

• random sampling

• convenience sampling

• volunteer sampling

• snowball sampling

is when every person in the target population has an equal chance of being sampled.  Typically, researchers will have the names of every person in the target population, and will select names at random.  This method is often used in telephone surveys before an election - every telephone number has an equal chance of being selected.

• random sampling

• convenience sampling

• volunteer sampling

• snowball sampling

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

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. 

• Simple Random

• Systematic

• Stratified

• Cluster