Lesson 7.1 & 7.2 Practice (Intro to Sampling Dist)

A researcher is studying math teachers in the U.S. to measure level of stress and happiness. They collect a random sample of 500 math teachers in California. What is the sample?

• All teachers in the world.
• math teachers in the U.S.

• 500 math teachers in CA

• All math teachers in CA

The manager of a book store wants to know if its customers want the store open longer. They ask 10 people who buy mystery novels to see if the store should expand its hours.  What is the population?

• All Customers of the bookstore.

• People who buy mystery novels.
• 10 people who buy mystery novels

• People who like to read.

_______ is the entire group of objects or individuals considered for a survey.

• Sample
• Population
• Random Sample
• Paramter

_______ is a part of a group being surveyed.

• Sample
• Population
• Random Sample
• Quartile

A scientist studies 1 herd of deer to learn about their dietary habits.  Identify the population.

• 1 heard of deer

• All deer

A student wants to know which type of pizza the students at his high school prefer. Which option would give an unbiased, representative sample:

• surveying all the students in the lunch line.

• surveying 10 random students from each 1st period.

• surveying all the 10th graders.

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

• True

• False

When a sample does not accurately represent the population it is a:

• Unbiased sample

• Biased sample

Cherokee County Schools randomly selected 230 teachers to find out which technology resource its teachers feel is the most effective. What is the population in this situation?

• 230 Teachers

• All Cherokee County teachers

• All Cedar Bluff teachers

• All Sand Rock and Spring Garden students

A company has 1,200 employees. The average annual salary for 35 accountants is $68,000.

Is this value a parameter or a statistic?