Describe each steps of the the scientific method. Assess the role of reproducibility, collaboration, and peer review as part of scientific inquiry .
State the problem - what are you going to investigate
Background Research - what is already known about the topic? If it has already been studied, then usually no need to do it again. Many times scientists will replicate old experiments to validate them OR they will modify one variable to see if something else will cause the same results.
State the hypothesis - this is tricky. Ideally, the hypothesis is what you think may happen based on what is previously known. However, there may be times when researchers create a null hypothesis, which basically is there way of making sure they are always correct in their findings. The null hypothesis says what they think will not happen.
Do the experiment - this is the methodology. It needs to be perfectly detailed so that someone else can replicate it exactly. This addresses your question about reproducibility. If an experiment cannot be reproduced, it is not valid (usually). ...
This answer describes the steps of the scientific method and why peer review, collaboration, and reproducibility are important when conducting an experiment.