(Answered) As an experiment the investigators decided to take two

Statistics

As an experiment, the investigators decided to take two measurements on the patient. One measurement will be made using the precise machine (withσI= 5) and the other will be made using the less precise machine (withσII= 8). These two measurements will then be averaged to provide an estimated EF value for the patient. Assume that the two measurements are independent. What would the standard deviation of that estimate be?

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