Sampling and Surveys

A ___ is a large group that includes everything being studied.

• Sample
• Stratified Sampling Method
• Population
• Voluntary-Response

A ___ is a small portion of the population used to gather data from.

• Systematic Sampling Method
• Sample
• Population
• Bias

Identify the Population:

Kannapolis City Schools randomly selected 130 teachers to find out which technology resource it's teachers feel is the most effective.

• 130 Teachers

• All Kannapolis City Schools Teachers

• Kannapolis CIty Schools Students

• Kannapolis City Administration

Identify the Sample:

Kannapolis City Schools randomly selected 130 teachers to find out which technology resource it's teachers feel is the most effective.

• Kannapolis City Schools Administration

• 130 Kannapolis City Schools Teachers

• 130 Kannapolis City Schools Students

• Kannapolis Residents

Unbiased sampling is:

• when you choose the group you think will represent the sample
• when any member of the population is equally likely to be chosen for the sample

Biased sampling is

• when you choose a population that is more likely to give you the result you want
• when you choose a group that is equally likely to be chosen

True or False: all samples lead to a good prediction about an entire population.

• True
• False

You are asked to give a survey and want to make groups. Which one(s) is/are not appropriate.

• Stratified Sampling

• Cluster Sampling

• Random Sampling

• Systematic Sampling

You are asked to create a survey and want to make groups. Which one(s) is/are appropriate methods.

• Stratified Sampling

• Cluster Sampling

• Random Sampling

• Convenience Sampling

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate and unbiased results?

• thirty students who are often tardy

• thirty students who are rarely tardy

• thirty of her friends

• thirty randomly selected students from her school