IDENTIFY THE APPROPRIATE MEASUREMENT SCALE FOR THE FOLLOWING: VARIABLE MEASUREMENT SCALE LENGTH BODY TEMPERATURE TIME OF DAY (NIGHT, DAWN, NOON, AFTERNOON, EVENING) PH HAIR COLOUR RANKING OF JOURNALS IN A CATEGORY ACCORDING TO IMPACT FACTOR PRESENCE OR ABSENCE OF INFECTION HEIGHT

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This paper consists of 104 marks and constitutes 20% of your grade for this unit.
REFERENCES should be between 2010- 2015

QUESTION 1 (3marks)
a) Locate, and give the reference for,one article that represents the highest evidence available relating to the changing of intravenous administration sets.
b)According to the JBI evidence hierarchy (effectiveness domain), what level of evidence is this article?
c) What is the evidence regarding the frequency of administration set changes?

QUESTION 2 (10 marks)
a) Identify the appropriate measurement scale for the following:
Variable Measurement Scale
Length
Body temperature
Time of day (Night, Dawn, Noon, Afternoon, Evening)
pH
Hair Colour
Ranking of journals in a category according to impact factor
Presence or absence of infection
Height

b) You construct a survey and create categories for age – what scale is this? Identify one advantage and one disadvantage of measuring the variable in this way.

QUESTION 3 (2 marks)
The lifespan of light bulbsis normally distributed, with a mean life of 850 hours, and a standard deviation of 20 hours.
a) What would be the expected lifespan of approximately 99% of the light bulbs?
b) What percentage of light bulbs should last for at least830 hours?

QUESTION 4 (8 marks)
Nursing staff in a surgical ward are interested in acupressure in treating postoperative nausea and vomiting. They decide to carry out a study comparing its effectiveness with that of standard treatment. Patients must consent to the study to be included.
a) Explain the difference between internal and external validity in studies such as this[2 marks]
b) Identify 3 threats to internal validity in this study and suggest strategies by which they could be prevented or reduced [6 marks]

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