Q.1 Which of the following is the primary purpose of data analysis in nursing research?
To collect raw data
To interpret findings
To identify participants
To write the literature review
Explanation - Data analysis in nursing research is mainly used to interpret findings and give meaning to the data collected.
Correct answer is: To interpret findings
Q.2 Which statistical measure indicates the average value in a dataset?
Mean
Mode
Median
Range
Explanation - The mean represents the arithmetic average of all values in a dataset.
Correct answer is: Mean
Q.3 In data interpretation, a p-value less than 0.05 usually indicates what?
High error rate
Statistical significance
Poor sampling
No correlation
Explanation - A p-value < 0.05 suggests that the observed results are statistically significant and unlikely due to chance.
Correct answer is: Statistical significance
Q.4 Which type of statistics is used to summarize and describe data?
Inferential statistics
Descriptive statistics
Predictive statistics
Experimental statistics
Explanation - Descriptive statistics summarize and describe the features of a dataset, such as mean, median, and mode.
Correct answer is: Descriptive statistics
Q.5 A histogram is primarily used to display which type of data?
Categorical
Nominal
Continuous
Ordinal
Explanation - Histograms are used for continuous data to show frequency distribution across intervals.
Correct answer is: Continuous
Q.6 Which test is appropriate for comparing means between two independent groups?
Chi-square test
ANOVA
Independent t-test
Paired t-test
Explanation - The independent t-test is used to compare the means of two independent groups.
Correct answer is: Independent t-test
Q.7 In nursing research, coding data involves:
Collecting responses
Transforming raw data into categories
Calculating percentages
Testing hypotheses
Explanation - Coding is the process of organizing raw data into categories to facilitate analysis.
Correct answer is: Transforming raw data into categories
Q.8 The measure of how spread out data values are is called:
Mean
Variance
Mode
Median
Explanation - Variance measures the degree to which data points differ from the mean, showing the spread of data.
Correct answer is: Variance
Q.9 Which type of error occurs when a true null hypothesis is rejected?
Type I error
Type II error
Sampling error
Measurement error
Explanation - Type I error happens when a researcher rejects a true null hypothesis, indicating a false positive.
Correct answer is: Type I error
Q.10 A scatter plot is used to examine:
Mean differences
Frequency counts
Relationships between variables
Central tendency
Explanation - Scatter plots visually display relationships or correlations between two quantitative variables.
Correct answer is: Relationships between variables
Q.11 Which is the most appropriate measure of central tendency for skewed data?
Mean
Median
Mode
Range
Explanation - The median is less affected by extreme values and is therefore preferred for skewed data.
Correct answer is: Median
Q.12 Chi-square tests are generally used for which type of data?
Continuous
Categorical
Interval
Ratio
Explanation - Chi-square tests are applied to categorical data to test associations between variables.
Correct answer is: Categorical
Q.13 Which of the following indicates the strength and direction of a linear relationship?
Mean
Standard deviation
Correlation coefficient
Variance
Explanation - The correlation coefficient (r) measures both the strength and direction of a linear relationship.
Correct answer is: Correlation coefficient
Q.14 Which is NOT an example of descriptive statistics?
Mean
Frequency
ANOVA
Median
Explanation - ANOVA is an inferential statistical test, not a descriptive measure.
Correct answer is: ANOVA
Q.15 What does a standard deviation close to zero indicate?
Wide variability
Narrow variability
No mean value
Strong correlation
Explanation - A small standard deviation means most values are close to the mean, indicating low variability.
Correct answer is: Narrow variability
Q.16 Which of the following tests is appropriate for comparing means of more than two groups?
t-test
ANOVA
Chi-square
Correlation
Explanation - ANOVA (Analysis of Variance) is used when comparing means among three or more groups.
Correct answer is: ANOVA
Q.17 In qualitative data analysis, thematic analysis is used to:
Test hypotheses
Identify patterns and themes
Calculate averages
Assess variability
Explanation - Thematic analysis helps identify and analyze recurring patterns in qualitative data.
Correct answer is: Identify patterns and themes
Q.18 Which measure of dispersion is the difference between the largest and smallest values?
Variance
Standard deviation
Range
Median
Explanation - Range is calculated as the difference between the maximum and minimum values in the dataset.
Correct answer is: Range
Q.19 In data interpretation, what does a correlation coefficient of -0.9 indicate?
Weak negative correlation
Strong negative correlation
Weak positive correlation
No correlation
Explanation - A correlation close to -1 indicates a strong negative relationship between two variables.
Correct answer is: Strong negative correlation
Q.20 What is the first step in data analysis after data collection?
Hypothesis testing
Data cleaning
ANOVA test
Drawing conclusions
Explanation - Before analysis, researchers must clean data by checking for errors, missing values, or inconsistencies.
Correct answer is: Data cleaning
Q.21 In nursing research, inferential statistics help to:
Summarize data
Generalize findings to a population
Collect data
Describe participants
Explanation - Inferential statistics use sample data to draw conclusions about a larger population.
Correct answer is: Generalize findings to a population
Q.22 Which graph is best to display the distribution of categorical data?
Histogram
Pie chart
Scatter plot
Line graph
Explanation - Pie charts are effective for representing proportions of categorical data.
Correct answer is: Pie chart
Q.23 Which test is used to assess relationships between two categorical variables?
t-test
ANOVA
Chi-square test
Regression analysis
Explanation - Chi-square tests assess the association between two categorical variables.
Correct answer is: Chi-square test
Q.24 What does data interpretation primarily aim to achieve?
Generate raw data
Provide meaning to results
Design sampling method
Conduct experiments
Explanation - Data interpretation helps researchers understand and explain the significance of their results.
Correct answer is: Provide meaning to results
Q.25 Regression analysis is mainly used to:
Summarize data
Predict outcomes
Find averages
Display distributions
Explanation - Regression analysis predicts the value of a dependent variable based on one or more independent variables.
Correct answer is: Predict outcomes