Hypothesis, Groups, and Data (Experimental Design Review)

Multiple Choice

The best format for a hypothesis is

• If.....then...... because

• Then.....if...... because

• If......then

• There is no best format - write it how you like.

Multiple Choice

Your _____ should be written after the "if" in your hypothesis.

• dependent variable (DV)

• independent variable (IV)

• reasoning/explanation

Multiple Choice

Your _____ should be written after the "then" in your hypothesis.

• dependent variable (DV)

• independent variable (IV)

• reasoning/explanation

Multiple Choice

Your _____ should be written after the "because" in your hypothesis.

• dependent variable (DV)

• independent variable (IV)

• reasoning/explanation

Multiple Choice

Your hypothesis should be an educated guess. It is educated because

• of your data.

• it is written in a proper format.

• you do research before forming your hypothesis.

Multiple Choice

What would the independent variable be in this experiment, and where would it go in the hypothesis?

• the volume of the music

  after the then

• the volume of the music

  after the if

• how fast the students run

  after the if

• how fast the students run

  after the then

Multiple Choice

What would the dependent variable be in this experiment, and where would it go in the hypothesis?

• the volume of the music

  after the then

• the volume of the music

  after the if

• how fast the students run

  after the if

• how fast the students run

  after the then

Multiple Choice

Which would be a good hypothesis for Experiment #2?

• If I give my tomato plants Miracle Grow then the tomatoes will grow larger because Miracle Grow has extra nutrients.

• If the tomatoes grow larger then I gave my tomato plants Miracle Grow because Miracle Grow works.

• If Miracle Grow has extra nutrients then the tomatoes will grow larger because Miracle Grow has extra nutrients.

• If Miracle Grow has extra nutrients then I will give my tomato plants Miracle Grow because I want the tomatoes to grow larger.

Multiple Choice

Which would be Roy's hypothesis?

• If a person gets more sleep then their math grades will go up because more sleep helps a person think more clearly.

• If a person gets more sleep then their math grades will not be affected because more sleep does not make a person think more clearly.

• More sleep makes a person's math grades go up.

• More sleep will not make a person's math grades go up.

Multiple Choice

Which would be Alan's hypothesis?

• If a person gets more sleep then their math grades will go up because more sleep helps a person think more clearly.

• If a person gets more sleep then their math grades will not be affected because more sleep does not make a person think more clearly.

• More sleep makes a person's math grades go up.

• More sleep will not make a person's math grades go up.

Multiple Choice

What is the purpose of a control group?

• There isn't a purpose - you don't have to have one.

• To determine what if any influence the independent variable has.

• To have a standard to compare to - "normal" conditions, without the independent variable.

Multiple Choice

What is the purpose of an experimental group?

• There isn't a purpose - you don't have to have one.

• To determine what if any influence the independent variable has.

• To have a standard to compare to - "normal" conditions, without the independent variable.

Multiple Choice

Which group(s) get the independent variable?

• control group only

• experimental group only

• both the control group and the experimental group

Multiple Choice

You should use ______ dependent variable(s) in the control group and the experimental group.

• the same

• different

Multiple Choice

Which group(s) get the controlled variables or constants?

• control group only

• experimental group only

• both the control group and the experimental group

Multiple Choice

Which is true about the number of each group you can have in an experiment?

• Only one control group.

  Several experimental groups.

• Only one experimental group.

  Several control groups.

• You can have only one control group and only one experimental group.

• You can have several control groups and several experimental groups.

Multiple Choice

If you have several experimental groups, each gets ____ independent variable.

• the exact same

• a variation of the

• a completely different

Multiple Choice

Data comes from

• research done before the experiment.

• the observations/ measurements made during the experiment.

• a chart or graph.

Multiple Choice

How should data be organized?

• into paragraphs

• in an if.....then.....because.... format

• charts or graphs

Multiple Choice

If the data does NOT support the hypothesis, what should the experimenter do?

• Publish the results for others to read.

• Change the hypothesis and start over.

• Have another person repeat the experiment to see if they get the same results.

Multiple Choice

If the data DOES support the hypothesis, what should the experimenter do?

• Publish the results for others to read.

• Change the hypothesis and start over.

• Have another person repeat the experiment to see if they get the same results.

Multiple Choice

Which is correct about Experiment #1?

• Group 1 got the IV - it was the control group.

  Group 2 did not get the IV - it was the experimental group.

• Group 1 got the IV - it was the experimental group.

  Group 2 did not get the IV - it was the control group.

• Group 2 got the IV - it was the control group.

  Group 1 did not get the IV - it was the experimental group.

• Group 2 got the IV - it was the experimental group.

  Group 1 did not get the IV - it was the control group.

Multiple Choice

Did the data support the hypothesis in Experiment #1?

• yes

• no

Multiple Choice

What is the independent variable in Experiment #2?

• the size of the tomatoes

• how tall the tomato plants get

• the amount of Miracle Grow the plants get

• the extra nutrients in the Miracle Grow

Multiple Choice

What was the purpose of Garden A?

• To have plants that did not get Miracle Grow to compare to - then you can see if the Miracle Grow made a difference or not.

• To collect more data on the effects of Miracle Grow.

• It didn't really have one - it was just the original garden.

Multiple Choice

Which is the control group in Experiment #2?

• Garden A

• Garden B

• both gardens

• neither garden

Multiple Choice

Which is the experimental group in Experiment #2?

• Garden A

• Garden B

• both gardens

• neither garden

Multiple Choice

Did the data support the hypothesis in Experiment #2?

• yes

• no

Multiple Choice

What should the experimenter in Experiment #2 do next?

• Choose another hypothesis and start over.

• Have someone else repeat the experiment to give the results validity.

Multiple Choice

Which is/are the control group(s) in Experiment #3?
(Hint: The IV is MORE sleep.)

• Group 1 only

• Group 2 only

• Group 3 only

• Groups 2 and 3

Multiple Choice

Which is/are the experimental group(s) in Experiment #3?
(Hint: The IV is MORE sleep.)

• Group 1 only

• Group 2 only

• Group 3 only

• Groups 2 and 3

Multiple Choice

Whose hypothesis did the data support?

• Roy's

• Alan's