The experiment conducted was a 1 tailed experiment dealing with the decrease of gouth in rye grass when aspirine is given. It was found that it decrease the grouth or rye grass.
My experimental hypothesis was that aspirin will decrease the grouth of the rye grass because it is a drug.
The subjects used in the experiment were 60rye grass seeds (lot number TB DASH 2083) from Agway Inc. Syracuse, NY. Apparatus used included potting soil, four bottom portions of water containers, two plastics bags. Two groups of thirty were made. The subjects were placed in the water containers with the potting soil and , four pierces were made to each of the containers. The subjects were placed in the plastics bags until the subjects sprouted. When they sprouted the groups were labeled, group A was rhe control group and B was the experimental group. The independant variable was two tablets of aspirin that were dissolved with 250 ml of water and given to the experimental group once a week for two weeks. The control group only received water. The subjects grew for 14 days and they were measured from the root to the top .
Fourty six of the sixty grew up for both groups. The statistics used was the Mann - Whithney U. The mean of the control group was 15cm, and the mean in the experimental group was 11.8 cm. The U obt was 397.5. I had to use the formula because I had more than 20 subjects in the control group. So I reject the Null Hypothesis. ( See graph )
The hypothesis in the experiment was tha aspirin will decrease the grouth of the rye grass and we rejected the null hypothesis, so the experimental hypothesis was right.
There were a big difference between both groups not only the height but the color was different too.