This question is about experiment and hypothesis
Students carry out an experiment into the effects of exercise on their pulse rate. Samara takes Mimaki's pulse while Mimaki is seated. Mimaki then runs in place for 2 minutes and Samara takes her pulse again. How could their experiment improve?
This experiment is to see the effects of exercise on pulse rate. A hypothesis that could be tested by this experiment is that, the pulse rate increases after exercise. The pulse taken at rest is the control group. The pulse taken after running in place for two minutes is the experimental group. The independent variable is the level of exercise and the dependent variable is the pulse rate. This experiment's main flaw is that the number of participants in the sample needs to be large, varied by age and should include females and males. An experiment with one subject cannot possibly garner enough data to be valid. Once the sample size is increased, a conclusion can be made pertaining to this experiment. The data could be shared with other scientists and further research can be done.