Question

Jaylen and kathryn designed an experiment to test the effectiveness of different laundry detergents. they used two different laundry detergents on two shirts of the same size, material, and color which had been treated with five stains of the same size. they washed each shirt with its designated detergent in the same washer on the same cycle and temperature setting. then they hung the shirts outside to dry. after the shirts dried, they looked at the shirts and decided which detergent worked better on the stains. they disagreed on the results, because one detergent worked better on some stains, and the other detergent worked better on other stains.

Answer 1

Answer:

Purpose : Purpose of this experiment is to find out the best detergent among the two being tested for the same stains on two same shirts.

Hypothesis : Detergent A is more effective then detergent B.

Background : Laundry detergent is a very common household item so its production and sales has become very important. It comes in both liquid and powder form. However liquid detergents are more effective for removing grease and oil stains.

Independent variables : stains shouldn't be disturbed.

dependent variables :  stains being washed in detergent

constant variables : stains.

Materials: T -shirt, Permanent marker, liquid measuring cup, detergent A & detergent B, washing machine, dryer.

Results: Results shows that detergent A is better than detergent B since it remove all stains

Answer 2

Answer:  

1. Good Experimental Design : Control Variable Independent Variable Dependent Variable  
2. Needs Improvement : Number of trials Control Group data analysis