Why can type I error and type II error not be both present for one given hypothesis?
a. Power analysis makes one type of error less likely.
b. One refers to rejecting the null hypothesis when it is true and the other to accepting it when it is false.
c. As beta rises, alpha falls.
d. The researcher sets both the alpha level and the beta level.
e. Qualitative research does not use power analysis.
ANS: B, C
The researcher sets the values of two theoretical probabilities: (1) the probability of rejecting the null hypothesis when it is in fact true (alpha [α]; type I error), and (2) the probability of retaining the null hypothesis when it is in fact false (beta [ß]; type II error). In nursing research, alpha is usually set at 0.05, meaning that the researcher will allow a 5% or lower chance of making a type I error. The beta is frequently set to 0.20, meaning that the researcher will allow for a 20% or lower chance of making a type II error. A type II error occurs if the null hypothesis is regarded as true when, in fact, it is false.
You might also like to view...
What classification of drugs does the nurse administer to treat peptic ulcers by suppressing the secretion of hydrochloric acid into the lumen of the stomach?
A) Antipeptic agents B) Histamine-2 antagonists C) Proton pump inhibitors D) Prostaglandins
The nurse is teaching the client with newly diagnosed type 2 diabetes mellitus how to keep track of his caloric intake
Although it is commonly assumed that fiber does not provide any calories, the client is surprised to learn that research indicates that the caloric value of fiber is which of the following? A) Between 1 cal/g and 2 cal/g C) Between 2 cal/g and 3 cal/g B) Between 1.5 cal/g and 2.5 cal/g D) Between 2.5 cal/g and 3.5 cal/g
The best approach for the nursing assistant to take in the care of the patient with COPD is
A) giving total care so the patient gets as much rest as possible. B) providing lots of high-fat and high-carbohydrate snacks. C) pushing the patient in a wheelchair so she does not have to walk. D) providing fluids the patient likes and encouraging him or her to drink.
The nurse determines that a patient has long-term immunity against a disease. Which part of the immune system should the nurse recognize is responsible for this patient's long-term immunity?
a. IgE b. IgG c. Mast cells d. Plasma cells