Unbiased and Biased Samples

To evaluate the defect rate of its memory chips, an integrated circuit manufacturer tests every 100th chip off the production line.

• Simple Random Sample

• Systematic Random Sample

• Convenience Sample

• Voluntary Response Sample

To evaluate the defect rate of its memory chips, an integrated circuit manufacturer tests every 100th chip off the production line.

• Biased Sample

• Unbiased Sample

Students who wish to represent the school at a school board meeting are asked to stop by the office after lunch

• Simple Random Sample

• Systematic Sample

• Convenience Sample

• Voluntary Response Sample

Students who wish to represent the school at a school board meeting are asked to stop by the office after lunch

• Biased Sample

• Unbiased Sample

A real estate agent surveys people about their housing preferences at an open house for a luxury townhouse.

• Simple Random Sample

• Systematic Random Sample

• Convenience Sample

• Voluntary Sample

A real estate agent surveys people about their housing preferences at an open house for a luxury townhouse.

• Biased Sample

• Unbiased Sample

To determine the most popular children’s programs, a television station asks parents to call in and complete a phone survey.

• Simple Random Sample

• Systematic Random Sample

• Convenience Sample

• Voluntary Response Sample

To determine the most popular children’s programs, a television station asks parents to call in and complete a phone survey.

• Biased Sample

• Unbiased Sample

Airline boarding passes are marked with red stars at random to decide which passengers should have their carry-on luggage inspected.

• Simple Random Sample

• Systematic Random Sample

• Convenience Sample

• Voluntary Response Sample

Airline boarding passes are marked with red stars at random to decide which passengers should have their carry-on luggage inspected.

• Biased Sample

• Unbiased Sample