A researcher randomly assigns volunteers into two groups: group 1 (control group) takes an exam after sleeping less than 8 hours the night before the exam, whereas group 2 (experimental group) gets 8 or more hours of sleep the night before the exam. All students took the exam. The researcher uses a computer statistical software package to compare the mean score of subjects in group 1 and group 2
This results in statistics of t = 2.84, degree of freedom (50 + 50 = 100 – 2) = 98, and p = 0.03. Which statistical test, if any, was conducted in this study?
1. An independent sample t test
2. A dependent sample t test
3. A nursing student t test
4. An analysis of variance or ANOVA
1
Rationale 1: The first clue should be the statistic of t =. However, this just tells you it is a t test, not which type of t test. Because test scores are for two independent groups, this is an independent sample t test.
Rationale 2: A paired or dependent sample t test usually has two measures on one group–a before and an after measure.
Rationale 3: There is not a common statistical test with this name.
Rationale 4: ANOVAs are reported as F values, not t values.
Global Rationale:
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The nurse teaches parents that the severity of infant respiratory distress syndrome (RDS) is most influenced by:
a. poor cough and gag reflex. b. the gestational age at birth. c. administering high concentrations of oxygen. d. the sex of the infant.
The mother of an infant with multiple anomalies tells the nurse that she had a viral infection in the beginning of her pregnancy. Which viral infection is associated with fetal anomalies?
a. Measles b. Roseola c. Rubella d. Herpes simplex virus (HSV)
Which of the following recommendations resulting from the 1934 study Nursing Schools Today and Tomorrow still has relevance today?
a. Nursing students should be trained on the job. b. Nursing students should be used to staff hospitals on the weekends. c. Nurses should be highly educated. d. Nurses with highly developed instincts do not require standards of practice.
The nurse is preparing to give a patient a medication via a piggyback infusion. What is the safest action for the nurse to take?
a. Fill the tubing with medication before connecting it to the Y-port. b. Obtain a second intravenous (IV) site where the infusion will be administered. c. Ask the patient his or her preference about starting a new IV line. d. Consult with the healthcare provider to obtain the best approach.