Population and Sample Game

The school librarian wants to determine how many students use the library on a regular basis.  What type of sampling method would she use if she chose to select every 3rd student who enters the library on Tuesday.

• Convenience Sample only

• Simple Random Sample

• Stratified Random Sample

• Systematic Sample

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

• True

• False

Mrs. Croix is conducting a survey to find out the favorite snack of fifth and sixth graders. She will ask a sample of 100 students. Which of the groups below should be surveyed to get the BEST representative sample?

• 100 students at the movie theater

• the first 100 students who go to a local baseball game

• 5 students from each of the 20 local elementary schools

• 20 students from each of the 5 local fifth- and sixth-grade schools

Which of the following is one of the main properties used to describe a population?

• number of individuals

• color of individuals

• number of species

• kind of adaptations

Professionals who study and make predictions about human populations are called

• stenographer

• demographer

• geologist

• populist

All the members of one species in a particular area is the definition of ____________.

• Ecosystem

• Community

• Population

• Organism

What is the main difference between a population and a sample in scientific research?

• A population includes all members of a group, while a sample includes only a subset.

• A sample includes all members of a group, while a population includes only a subset.

• A population is always larger than a sample.

• A sample is always larger than a population.

Which of the following is a method to ensure a sample is representative of a population?

• Using a convenience sample

• Using a systematic sample

• Using a biased sample

• Using a random sample

In an experiment, why is it important to have a control group?

• To ensure the sample size is large enough

• To have a basis for comparison with the experimental group

• To increase the variability of the results

• To ensure the population is diverse

True or False: A larger sample size always leads to more accurate results in scientific studies.

• True

• False