Alg II Data Collection

An amphitheater wants to know if Saturday morning concerts would be attended. The amphitheater is divided into 30 different seating areas. It surveys all the members in five randomly selected seating areas. What type of sampling method is used?

• convenience

• cluster

• systematic

• stratified

The manager of an orange juice plant wants to test the quality of the plant’s new extra-pulp orange juice. She does a taste test of every twentieth container of extra-pulp orange juice. What type of sampling method was used?

• cluster

• convenience

• stratified

• systematic

A town council wants to know whether residents support lower taxes for those who own waterfront property. Thirty-four owners of waterfront property are surveyed. Choose the type of sampling method and bias.

• cluster;

  People who own waterfront property will support lower taxes for those who own waterfront property

• convenience;

  People who own waterfront property will support lower taxes for those who own waterfront property

• Systematic;

  People who own waterfront property will support lower taxes for those who own waterfront property

A local radio station is considering switching from country music to classical music. Randomly throughout the day it announces the phone number and website where listeners can go to place their vote for either country music or classical music.

Type of sampling method and bias.

• Self-selected;

  Only people who currently listen to station can participate and will likely choose country

• Systematic;

  Only people who currently listen to station can participate and will likely choose country

• Convenience;

  unbiased

Is the sample biased?

A local senator is proposing a bill to lower the limit on the number of lobster that can be caught each day. Participants in a local fishing tournament are asked to complete a survey.

• Biased

• Unbiased

Is the sample biased?

A triathlon organizer wants to know if a Saturday morning triathlon is preferred over a Sunday morning triathlon. The organizer randomly surveys five triathletes in one of the age groups.

• Biased

• Unbiased

Explain why the question may be biased.

“Our plant has not been making a profit. Do you agree that the company should close this plant?”

• question encourages a certain response with "Do you agree..."

• Unbiased question

• addresses more than one issue

• does not give adequate information

Explain why the question may be biased.

“Do you agree that the mayor is receiving a salary that is far beyond what is reasonable?”

• question encourages a certain response with persuasive language "far beyond reasonable"

• Unbiased question

• addresses more than one issue

• does not give adequate information

Population or Sample?

the address of every student in the school

• population

• sample

Population or Sample?

a survey of 80 people who access a website

• population

• sample