Whаt is the аpprоpriаte оrder оf the steps of investigating whether maple trees drop their leaves in the autumn because of colder days? Maple trees are grown in 2 greenhouses where the only variable is temperature (15°C vs. 10°C). The hypothesis is rejected. There is no statistical difference in the number of leaves dropped at 10°C as compared to 15°C. The observation is that maple trees drop their leaves in autumn. The hypothesis is that maple trees drop their leaves because of colder temperatures.