Understanding Sampling

Imagine you're a detective named Lucas at your school, tasked with uncovering the most beloved subject among students. You cleverly assign each student a unique number and then, with the help of a magical random number generator, you select 50 students including Laylaah, Finley, and Parker for your top-secret mission.

• Simple Random Sampling

• Stratified Random Sampling

• Systematic Random Sampling

Answer explanation

Simple Random Sampling involves selecting a random sample from the entire population without any specific criteria. In this case, Lucas used a random number generator to select students, making it a simple random sampling method.

Imagine you're Rory, a curious student studying traffic patterns at a bustling intersection. Every 5th minute during rush hour, you jot down the flow of cars and bikes. It's a fun challenge to predict the next wave!

• Simple Random Sampling

• Stratified Random Sampling

• Systematic Random Sampling

Answer explanation

Systematic Random Sampling involves selecting every kth element from a list, making it suitable for capturing patterns like traffic flow at regular intervals, as Rory does every 5th minute.

Imagine you're assisting Brodie in managing the busy lunch crowd at a popular campus cafeteria. To enhance customer service, you decide to measure the waiting times. Every 5th student who steps through the cafeteria doors during the peak lunch hours gets their waiting time recorded. What type of sampling method are you using?

• Simple Random Sampling

• Stratified Random Sampling

• Systematic Random Sampling

Answer explanation

The sampling method being used is Systematic Random Sampling because every 5th student is selected in an organized manner, ensuring a systematic approach to data collection.

Choose the true statement(s) about the census and sample shown.

• The sample could be considered too small.

• The sample is biased because is does not include everyone.

• The sample is representative of the population's sub-groups.

7.SP.1

• A

• B

• C

• D

If a population consists of 500 people and a sample of 50 people is taken, what is the sample size as a percentage of the population?

Cherokee County Schools randomly selected 230 teachers to find out which technology resource its teachers feel is the most effective. What is the population in this situation?

• 230 Teachers

• All Cherokee County teachers

• All Cedar Bluff teachers

• All Sand Rock and Spring Garden students

Identify the Sample: The Huddle House wants to know if their customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The manager at Huddle House concluded that most customers do not order dessert. What is the SAMPLE in this scenario?

• 20 customers from Huddle House

• All customers from Huddle House that evening

• 8 customers from Huddle House

• The employees from Huddle House

At Centre Middle School, the 7th graders will conduct a survey to decide where they want to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year

• to randomly choose some 7th grade students to select a location

• to ask all 7th grade teachers and administrators for a location

• to ask the Beta Club to choose a location

The city of Cedar Bluff has 832 registered voters. The election for mayor has 3 candidates. A telephone poll taken a day before the election of 67 voters that are friends of the candidates shows these results: 30 Smith, 27 Jones, 10 Brown. Name the sampling method used for this survey.

• Convenience Sample

• Random Sample