Math III - Statistical Study Practice 5/13

_________ is a sample in which each individual or object in the entire population has an equal chance of being selected.

• Sample
• Population
• Random Sample
• Quartile

A student surveys mathematics teachers to get their opinion on teaching.  What is the sample?

• All teachers in the world.
• All teachers within the school.
• All mathematics  teachers in the school.
• All teachers except mathematics teachers.

Kim surveys 100 moviegoers that entered the movie theater in the first hour.  What type of sampling method is this?

• Random
• Convenience
• Biased

A teacher decides to survey the students in her classes to find out their opinion on the new menu in the cafeteria.  Is this biased or unbiased?

• Biased
• Unbiased

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?

• The sample didn't include students.
• The sample is too small.
• The sample can only be accurate if each teacher is included in the sample

a controlled study in which the researcher attempts to understand cause-and-effect relationships by assigning subjects to groups and deciding which treatments each group receives

• survey

• observational study

• experiment

You want to see if students who have a 4.0 grade point average study more than those who do not.

• survey

• observational study

• experiment

Which of the following is not a way to choose a random sample of 25?

• Assign numbers. Use a random number generator to choose 25
• Put names in a hat, mix them up and choose 25
• Assemble possible participants in a circle around a person who is blindfolded,  spin the person around 3 times and have them point at a person.  Do this 25 times.

Flipping a fair coin in an experiment is a reasonable way to completely randomize in an experiment.

• True
• False

An ice cream shop asks its customers if they would like the shop to offer containers of ice cream to take home. What type of study is this?

• survey

• observational study

• experiment