In order for ER doctors to successfully work the 24 to 48 hour shifts often requ
ID: 3219483 • Letter: I
Question
In order for ER doctors to successfully work the 24 to 48 hour shifts often required of them, they commonly take the drug Nuvigil® (Armodafinil). This drug improves cognitive functioning, alertness, and focus providing ER doctors the energy they need to continue to provide the best care possible without making any critical mistakes. To evaluate the efficacy of this drug, which of the following statements would make an appropriate null hypothesis? Group A receives a placebo and group B receives drug Nuvigil.
the average pain score for patients under Group A doctors care equals the average pain score for patients under Group B doctors care
the average patient hospital stay times for Group A doctors equals the average patient hospital stay times for Group B doctors over 10 forty eight hour shifts
the number of paperwork/clerical mistakes made by Group A equals the number of paperwork/clerical mistakes made by Goup B during a 48 hour shift
the time on coffee breaks of Group B doctors is less than Group A doctors.
2.
The use of inferential statistics helps us decide whether to reject the null hypothesis by:
computing the probability that the overall hypothesis of the study is true
estimating the probability of obtaining observed group differences by chance alone
estimating how many participants one would need to test in order to show that the null hypothesis is false
computing how large a difference between two means has to be in order to be clinically relevant
Explanation / Answer
1;
The appropriate null hypothesis among the given is
H0: the number of paperwork/clerical mistakes made by Group A equals the number of paperwork/clerical mistakes made by Goup B during a 48 hour shift
2:
estimating the probability of obtaining observed group differences by chance alone
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