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

A survey is done to find out the favorite movies of 500 school students. The students are categorized into males and females, and a sample of 50 students is chosen.Which type of random sample is used for selecting a sample?

• Simple sampling

• Stratified sampling

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

The manager of a supermarket wants to survey their customers about their opinions on a new coffee shop. To obtain the sample, the manager surveys every tenth person coming into the supermarket, starting from the third customer of the day. Which sampling method is used for this study?

• simple random sampling

• systematic random sampling

• stratified sampling

A school wants to survey its students. They choose a sample by putting every student’s name into a hat and then drawing names from the hat. Which of the following is the sampling method used?

• simple random sampling

• systematic random sampling

• stratified sampling

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

A politician wanted to survey voters to determine whether to fund a highway construction in a city. To obtain the sample, the politician obtained a complete list of registered voters and assigned a unique number to each individual. Then, a sample was selected based on a list of random numbers generated by a computer program. Which sampling method was used for this study?

• simple random sampling

• systematic random sampling

• stratified sampling