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#605 - Experimental Design Pre-Assessment

Last updated almost 5 years ago
16 questions

Part 1 - SpongeBob Experiments!

Story 1 - Krusty Krabs Breath Mints

  • Mr. Krabs created a secret ingredient for a breath mint that he thinks will “cure” the bad breath people get from eating crabby patties at the Krusty Krab.
  • He asked 100 customers with a history of bad breath to try this new breath mint.
  • He had fifty customers (Group A) eat a breath mint after they finished eating a crabby patty.
  • The other fifty (Group B) also received a breath mint after they finished the sandwich, however, it was just a regular breath mint and did not have the secret ingredient.
  • Both groups were told that they were getting the breath mint that would cure their bad breath.
  • Two hours after eating the crabby patties, thirty customers in Group A and ten customers in Group B reported having better breath than they normally had after eating crabby patties.
1

In the story above, the breath mints would be considered

1

The number of customers who reported fresher breath.

1

Making each customers wait 2 hours after eating Krabby Patty & mint is an example of a/an

Story 2 - Sponge Bob Clean Pants:

Read the following
SpongeBob noticed that his favorite pants were not as clean as they used to be. His friend Sandy told him that he should try using Clean-O detergent, a new laundry soap she found at Sail-Mart. SpongeBob made sure to wash one pair of pants in plain water and another pair in water with the Clean-O detergent. After washing both pair of pants a total of three times, the pants washed in the Clean-O detergent did not appear to be any cleaner than the pants washed in plain water."My PaNtsaRE DIRty!"
1

What is the problem SpongeBob is trying to solve?

1

What is the independent variable in Sponge Bob Clean Pants?

1

What is the dependent variable in Sponge Bob Clean Pants?

1

How many trials are in the Cleanpants experiment?

ok, fun is over - no more SpongeBob.

Let's look at some real questions....

Part II. For each experimental question, identify the independent variable (IV), dependent variable (DV), constants and the control.


For Each, Ask Yourself:
  • What am I changing on purpose so that I can answer my question? -- this is your Independent Variable.
  • What is being measured? What data (numbers) are being collected? --this is your Dependent Variable.
  • What is staying the same in all of the exeriments? -- these are your Constants.
  • What is your zero IV level? What is your normal group that does not recieve any testing.---This is your Control
1

Does the brand of allergy medication affect the number of times a person sneezes?

  • The person taking the medicine
  • The amount of allery medicine
  • The brand of medicine
  • The number of sneezes
  • No allergy medicine
  • The time of day medicine is taken
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

Does the amount of soil a plant is placed in affect how tall it grows?

  • Height of plant (in cm)
  • Amount of soil
  • type of plant
  • No soil
  • amount of sunlight
  • amount of water
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

Which type of sunscreen prevents burns for the longest amount of time?

  • amount of sunscreen used
  • Brand of sunscreen
  • Time of day
  • Time to burn (minutes)
  • skin tone of persons being tested
  • No sunscreen
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

What paper towel brand absorbs the most water?

  • Size of paper towel
  • Surface water is spilled on
  • Temperature of water
  • None (need a paper towel to absorb any water)
  • Amount of water absorbed (mL)
  • Brand of paper towel.
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

Sam wants to figure out which pan cooks eggs the fastest: bronze, copper or steel.

  • Minutes until egg is cooked
  • Size of pans
  • Size of eggs
  • None (can't cook eggs without a pan)
  • Material pan is made out of.
  • Temperature stove burner is set on.
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

Ashton wants to see which fast food restaurant has french fries that will take the longest to grow mold.

  • Number of french fries
  • French fries are on the same table
  • Time to grow mold (days)
  • Handle french fries with gloved hands
  • Fries from different restraurants
  • None (can't test without french fries)
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

Which brand of dish soap makes the most amount of suds?

  • None (need suds to make bubbles)
  • Volume of suds (mL)
  • Brand of dish soap.
  • Amount of water
  • Amount of dish soap
  • Time water and soap is stirred
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

What type of physical activity gives you the highest heart rate?

  • Heart rate (beats per minute)
  • Type of physical activity
  • Sitting (no activity)
  • Outside temperature
  • Person doing the activity
  • Time spent on activity
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control
1

What type of detergent gets out grass stains the best?

  • washed in water without detergent
  • Area of stain removed (cm^2)
  • Size of original stain
  • Same wash cycle
  • Brand of detergent
  • Type of original stain
  • Independant Variable
  • Dependent Variable
  • Constants (3)
  • Control