# Nursing quiz

##### Nursing Research Quiz - 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

#### Nursing Research Quiz - 15

##### biostatistics
1. When explaining the direction of the linear association between two numerical paired variables, a positive correlation is stated when:

A. one variable increases and the other variable decreases or vice versa.

B. dependent variable increases and independent variable decreases

C. both variables increase and decrease at the same time.

D. correlation coefficient is stated close to 0.

2. A type of graphical presentation data used to explain correlation between dependent and independent variable is:

A. Histogram

B. Frequency polygon

C. Frequency curve

D. Scatter plot

3. Correlation coefficient ranges from:

A. 0.01 to 0.05

B. 0 to 1

C. -1 to +1

D. -3 to +3

4. A contingency table (2x2) is used to calculate:

A. t-statistic

B. correlation coefficient

C. variance

D. chi-squire statistic

5. The listed observations- 1,2,3,4,100, suggest the distribution:

A. is positively skewed

B. is negatively skewed

C. has zero skewness

D. is left-skewed

6. 95% confidence interval refers to:

A. considering  1 out of 20 chances are taken to be wrong.

B. considering 1 out of 100 chances are taken as wrong.

C. considering 95 out of 100 chances are taken as wrong.

D. considering 5 out of 20 chances are taken as wrong.

7. A tentative explanation/statement of a declaration of the expected outcome of a research study based on observations is called:

A. Relationships

B. Analysis

C. Variables

D. Hypothesis

8. In a naturalistic observation, the phenomenon in which the behaviour of the subjects being observed changes because they are being watched is called:

A. Observer bias

B. Observer effect

C. participant observation

D. Representative sampling

9. The entire group of people or animals in which the researcher is interested is called:

A. Sample

B. Experiment group

C. Sample

D. Controls

10. In the scientific investigation, the first step is:

B. Perceiving a question.

C. Drawing conclusion.

D. Testing hypothesis.