Nokea
In statistical methodology:
- A. The median and mean are different when the population distribution is skewed
- B. Mode refers to the value that occurs with the highest frequency
- C. The value of 'r' (coefficient of variation) ranges from -1 to +1
- D. Incidence is defined as the number of cases seen in the population at any given period of time
Correct Answer: A
Rationale: The median and mean differ in skewed distributions because the mean is influenced by extreme values, while the median is not.
You may also like to solve these questions
A father asks why his child with tetralogy of Fallot seems to favor a squatting position. What is the nurse's best response?
- A. Squatting increases the return of venous blood back to the heart.
- B. Squatting decreases arterial blood flow away from the heart.
- C. Squatting is a common resting position when a child is tachycardic.
- D. Squatting increases the workload of the heart.
Correct Answer: A
Rationale: The squatting position allows the child to breathe more easily because systemic venous return is increased.
A nurse is caring for a child with Down syndrome. Which statement by the parent indicates the need for further teaching?
- A. I will make sure my child has regular hearing screenings.
- B. I will encourage my child to be active and participate in play.
- C. I should monitor my child's thyroid function regularly.
- D. I should avoid giving my child a multivitamin supplement.
Correct Answer: D
Rationale: Children with Down syndrome may benefit from a multivitamin supplement, especially if they are at risk for nutritional deficiencies.
The reason that the hematocrit is so high is
- A. chronic hypoxia
- B. it was taken in a low cardiac output state
- C. it was a peripheral finger stick
- D. embolic stroke
Correct Answer: A
Rationale: Chronic hypoxia leads to secondary polycythemia as a compensatory mechanism.
In congenital hypertophic pulmonary stenosis
- A. Metabolic alkalosis occurs
- B. In some cases can be treated with non surgical methods
- C. During surgery tumor is removed
- D. Is a caus of conjugated hyperbilirubinaemia in neonate
Correct Answer: B
Rationale: Some cases of congenital hypertrophic pulmonary stenosis can be managed with non-surgical techniques like balloon valvuloplasty.
While looking through the chart of an infant with a congenital heart defect (CHD) of decreased pulmonary blood flow, the nurse would expect which laboratory finding?
- A. Decreased platelet count
- B. Decreased ferritin level
- C. Respiratory alkalosis
- D. Polycythemia
Correct Answer: D
Rationale: Polycythemia is often seen in infants with congenital heart defects that cause decreased pulmonary blood flow, as the body produces more red blood cells to compensate for low oxygen levels.