Identify the kind of sample that is described.

The sample described is a **stratified random sample**. In this case, the artist is dividing the artworks into different strata (or categories) based on the medium used: charcoal sketches, pencil drawings, and oil paintings. Within each strata, random samples are then selected. This method allows for representation from each category within the overall sample.

Identify the kind of sample that is described.

A pollster obtains a list of all the residential addresses in a certain town, and uses a random number generator to choose 20 of them. The pollster visits each of the 20 households and interviews all the adults in each household about their television viewing habits.

The described sample is a **simple random sample**. In this case, the pollster uses a random number generator to select 20 households from a complete list of all residential addresses, ensuring that each address has an equal chance of being selected. By visiting each of these households and interviewing all adults, the pollster gathers information in a way that does not favor any particular group or section of the population.

Identify the kind of sample that is described.

A news reporter asked everyone at the convenience store their opinion on the new town curfew.

The sample described is a **convenience sample**. In this case, the news reporter is surveying people who are readily available (those present at the convenience store) rather than randomly selecting individuals from the entire population. This method is based on accessibility, which may lead to bias because it does not represent the broader community's views.

Identify the kind of sample that is described.

A reality show assigns all qualified applicants a number and uses a random number generator to select the participant list.

The sample described is a **simple random sample**. In this scenario, all qualified applicants are assigned a number, and a random number generator is used to select participants, ensuring that each individual has an equal chance of being chosen. This method helps to avoid bias in the selection process and aims for a representative sample of the applicant pool.