Statistics Pre test

SECTION A: DEFINITION & CONCEPTS — Which of the following best defines statistics?

• The collection of numbers and data only

• The science of collecting, organizing, analyzing, and interpreting data to make decisions or draw conclusions

• A method used only in medical research

• The process of counting patients in a hospital

SECTION A: DEFINITION & CONCEPTS — Which of the following is an importance of statistics in nursing research?

• To reduce the number of patients in studies

• To validate nursing interventions and enable evidence-based practice decisions

• To replace clinical experience with numbers

• To avoid writing research proposals

SECTION A: DEFINITION & CONCEPTS — Statistics can be divided into two main types. What are they?

• Numerical and categorical statistics

• Descriptive and inferential statistics

• Primary and secondary statistics

• Quantitative and qualitative statistics

SECTION B: DESCRIPTIVE STATISTICS — The purpose of descriptive statistics is to:

• Make predictions about a larger population

• Test research hypotheses

• Describe and summarize data from a specific group

• Determine cause and effect relationships

What does standard deviation (SD) indicate?

• The average age of patients

• How spread out data is around the mean

• The total number of patients

• The difference between highest and lowest values

SECTION C: INFERENTIAL STATISTICS & TEST SELECTION — The purpose of inferential statistics is to:

• Describe the characteristics of a sample only

• Make predictions, test hypotheses, and generalize results from a sample to a larger population

• Avoid statistical analysis of data

• Organize data in tables only

SECTION C: INFERENTIAL STATISTICS & TEST SELECTION — A researcher wants to compare anxiety levels between Year 1 and Year 3 nursing students. Which test should be used?

• ANOVA

• Chi-square

• Independent t-test

• Paired t-test

SECTION C: INFERENTIAL STATISTICS & TEST SELECTION — Which inferential test is used to compare patients' blood pressure before and after a lifestyle modification program?

• Independent t-test

• Paired t-test

• ANOVA

• Correlation

SECTION C: INFERENTIAL STATISTICS & TEST SELECTION — A researcher wants to compare the average length of stay among patients in medical, surgical, and pediatric wards (3 groups). Which test is appropriate?

• Independent t-test

• Chi-square

• ANOVA

• Regression

SECTION C: INFERENTIAL STATISTICS & TEST SELECTION — To check if gender (male/female) is associated with preferred nursing specialty (ICU, Pediatrics, Community Health), which test should be used?

• Correlation

• Chi-square

• Paired t-test

• Regression