Final answer:
To create a null hypothesis for the research question on medication errors in different emergency room shifts, we assume that there are no differences in medication errors between the shifts.
Step-by-step explanation:
In order to create a null hypothesis for the research question, "What are the differences between emergency room shifts on medication errors?", we would assume that there are no differences between emergency room shifts in terms of medication errors. The null hypothesis could be stated as: "There is no significant difference in medication errors between emergency room shifts." This assumes that all shifts have the same rate of medication errors.
Learn more about Medication errors in emergency room shifts