Which of the following is an example of random error in measurement?
a. Consistent use of a tuning fork pitched too high
b. Inadvertent deletion of one question from the questionnaire sent to all subjects in a study
c. Occasional discussion of questions with some subjects during completion of the measurement tool
d. Use of a mismarked tape measure to determine infant head circumference
ANS: C
Random error can occur with variations in the administration of the measurement procedure, if subjects accidentally mark the wrong answer, or data are entered incorrectly into the computer in preparation for data analysis.
Although the measurements would be off, they would all be in the same direction.
Since all subjects received that same questionnaire, this would not represent random error.
Even though mismarked, the tape measure was used for all measurements and would not be random error.
You might also like to view...
An 8-year-old child states, "Whenever I have to stop playing my video game to take my medicine, I get very mad!" The most appropriate response for the nurse to make would be:
1. "You are telling me that you get mad. Tell me what you mean by mad." 2. "You need your medicine to get better; you know this." 3. "You need to just quit acting like a baby and take your medicine like a big boy." 4. "You are going to be just fine, you only have three more days to take this medicine."
Which of the following statements best captures an aspect of the process of fat digestion and absorption?
A) Ingested triglycerides are broken down into absorbable form by gastric lipase. B) Triglycerides are digested with the aid of bile salts. C) Long-chain fatty acids are absorbed directly into the portal blood. D) Stool is not excreted until all fat is absorbed.
A client has a history of recurring respiratory tract infections and presents today with cough and purulent sputum. The client also complains of longstanding fatigue and weakness. The nurse would assess the client further for
a. a viral infection. b. asthma. c. bronchiectasis. d. tracheobronchitis.
The nurse is preparing a client in her second trimester for a three-dimensional ultrasound examination. Which statement indicates that teaching has been effective?
1. "If the ultrasound is normal, it means my baby has no abnormalities." 2. "The nuchal translucency measurement will diagnose Down syndrome." 3. "I might be able to see who the baby looks like with the ultrasound." 4. "Measuring the length of my cervix will determine whether I will deliver early."