Question

Scenario #2: Bob's plant shop was trying to determine what was causing leaves on plants in their shop to change color related to temperature. What would be a design to study leaf color change related to temperature?

Scenario #3: Jim was trying to determine which gasoline he uses in his car gets him the best mileage. He use four gasolines: Exxon, Shell, BP and Mobil. What design could be used with this design?

1. Write a "Hypothesis" for each of the above proposed studies.

2. Write a "Null Hypothesis" for each of the proposed studies.

2. What would be the Independent Variable(s) in each?

3. What would be the Dependent Variable(s) in each?

4. What problems, if any, do you project with the proposed studies regarding the participants or outcomes?

Answer 1

Scenario #2

For this experiment you can take some plants from the store and put some in a cold room and the others in a warm room wait and see if there is a change of color in the leaves of the plants

1.- A hypotesis "The color of the leaves is dependent on the temperature, when putting the plants in a cold room they will keep their color"

2.-A null hypotesis "The color of the leaves is dependent on the temperature, when putting the plants in a warm room they will keep their color"

Hint: A hypothesis is an assumption that you get from the data you see and serves as the basis for an investigation, and the null hypothesis is the one you try to refute, reject or cancel

3.- The independent variable is the temperature

4.-The dependent variable is the color of leaf.

Hint for this:

The independent variable is the center of the experiment and is isolated and manipulated by you. The dependent variable is the measurable result of this manipulation (the desired results)

5.- Here the problem may be that the changes of light (as well as the seasonal ones) are what cause the change and Bob may not be able to realize that. Also if you are not an expert on plants you may be confused and think that you have some instead of others (such as false chestnuts and chestnuts as well as false pines and pines).

For Scenario 3:

In this experiment you can load a full fuel tank and until it is empty change the brand. Additionally Jim must try to follow the same route and must try to have the same driving style (relaxed or aggressive).

1.- The bp gas will have the best fuel milleage

2.- Tje bp gas will have the worst fuel milleage

3.- The brand of the gas

4.- The fuel milleage obtained of each brand

5.- Here the problems can be more because the experiment is something more complex and there are more variables that can affect it, because even if you try to follow the same route you can touch more traffic lights in red (which would falsely increase fuel consumption), as well as the state mechanic of the car, if it suffers a breakdown during the experiment among other things.