TEKS.MATH.9-12.VI.A.1

Why do we randomly select our samples?

• for control
• reduce bias
• so we don't get the same answers from everyone
• to eliminate confounding results

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TEKS.MATH.9-12.VI.A.1

TEKS.MATH.7.12B

Identify the design  for the experiment

• completely randomized, the factor is pesticide
• randomized block, blocked on tree type, the factor is pesticide
• This experiment is single blind, blocked by pesticide
• The experiment is double blind, the factors are tree type and pesticide

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TEKS.MATH.9-12.VI.A.1

Identify the sampling design: The LFCC registrar wants to investigate attitudes of their graduates.  The registrar randomly selects 100 names from each of the four past graduating classes.

• cluster
• volunteer
• stratified
• simple random

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TEKS.MATH.9-12.VI.A.1

TEKS.MATH.9-12.VI.A

Identify the sampling design: The LFCC registrar wants to investigate attitudes of their graduates.  The registrar randomly selects 100 names from each of the four past graduating classes.

• cluster
• volunteer
• stratified
• simple random

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TEKS.MATH.9-12.VI.A.1

TEKS.MATH.9-12.VI.A

The process of making sure there are no outside factors that are affecting the outcomes of the experiment is called...

• Replication
• Control
• Treatment
• Randomization

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TEKS.MATH.9-12.VI.A.1

Determining if students using a calculator on a math final exam score better than students who do not use a calculator 

• Cenus
• Sample Survey
• Experiment
• Observational Study

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TEKS.MATH.9-12.VI.A.1

Choosing people at random at the supermarket and asking them to taste two brands of orange juice to determine which brand they prefer.

• Census
• Sample Survey
• Experiment
• Observational Study

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TEKS.MATH.9-12.VI.A.1

Asking customers at a restaurant if pizza should be added to the menu.

• Census
• Sample Survey
• Experiment
• Observational Study

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TEKS.MATH.9-12.VI.A.1

Determine whether you would survey the population or a sample:

You want to know the average height of seventh-graders in Tallahassee.

• Survey the population

• Survey a sample

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TEKS.MATH.9-12.VI.A.1

Determine whether you would survey the population or a sample:

You want to know the favorite types of music of students in your homeroom.

• Survey the population

• Survey a sample

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TEKS.MATH.9-12.VI.A.1