Question

nd the difference between qualitative or quantitative
ii. tell whether each observation is qualitative or quantitative.

observation	qualitative	quantitative
the temperature outside is 25°c.		✗
the flower is red.	✗
the dog is 34 feet tall.		✗

make to choose the manipulated variable, responding variable & the control
iii. tell the:

• a. two plants are grown using the same light and pots. one plant is given water that has been microwaved and the other plant is given regular tap water. their height is measured after 2 weeks.
• manipulated variable:
• responding variable:
• control:
• b. the blood pressure of a soldier is measured while he is resting. the soldier is then exposed to a stressful environment and his blood pressure is measured again.
• manipulated variable:
• responding variable:
• control:
• c. an apple is cut into slices. half of the slices are sprayed with lemon juice. all slices are stored in a sealed plastic bag. after 4 days, they are observed to see how brown they turned.
• manipulated variable:
• responding variable:
• control:

Explanation:

Part A

Step1: Identify Manipulated Variable

The manipulated variable is what's changed. Here, it's the type of water (microwaved vs. regular tap water).

Step2: Identify Responding Variable

The responding variable is what's measured. Here, it's the plant's height.

Step3: Identify Control

The control is what's kept the same. Here, it's the light and pot for both plants.

Step1: Identify Manipulated Variable

The manipulated variable is the stress environment (exposed or not).

Step2: Identify Responding Variable

The responding variable is the blood pressure.

Step3: Identify Control

The control is the soldier (same individual) and resting state as baseline.

Step1: Identify Manipulated Variable

The manipulated variable is the application of lemon juice (sprayed or not).

Step2: Identify Responding Variable

The responding variable is the browning of apple slices.

Step3: Identify Control

The control is the storage (sealed plastic bag) and same apple source.

Answer:

• Manipulated Variable: Type of water (microwaved water vs. regular tap water)
• Responding Variable: Plant height
• Control: Same light and pot for both plants

Part B