Question 1

Which of the following best describes the main purpose of learning statistics in the health sciences, as outlined in the course introduction?

Accepted Answer

To better understand disease promotion, risk factors, and the effectiveness of interventions.

Question 2

According to the research process presented, which step comes immediately after 'Formulate research question'?

Accepted Answer

Define variables

Question 3

A researcher wants to measure the effect of a new medication on blood pressure. Patients are randomly assigned to receive either the medication or a placebo, and their blood pressure is measured after 8 weeks. Which type of research design is this?

Accepted Answer

Experimental

Question 4

Which of the following is an example of a qualitative (categorical) variable?

Accepted Answer

Type of blood group (A, B, AB, O)

Question 5

Which of the following best describes the difference between descriptive and inferential statistics?

Accepted Answer

Descriptive statistics summarize data; inferential statistics draw conclusions about populations from samples.

Question 6

A study collects the following data: gender, age, and cholesterol level. Which variable(s) are quantitative?

Accepted Answer

Age and cholesterol level

Question 7

Which of the following is NOT a component of the three main research components discussed in the course?

Accepted Answer

Data collection method

Question 8

A researcher wants to know the proportion of adults who smoke in a city. She randomly selects 500 adults and records whether each one smokes. What type of variable is 'smoking status'?

Accepted Answer

Qualitative (categorical)

Question 9

Which of the following best describes the process of statistical analysis?

Accepted Answer

The process of collecting, organizing, summarizing, and interpreting data.

Question 10

A study measures the temperature of patients before and after surgery. What is the best level of measurement for 'temperature'?

Accepted Answer

Interval

Question 11

Which of the following is an example of an ordinal variable?

Accepted Answer

Pain severity rated as mild, moderate, or severe

Question 12

A researcher is interested in the number of times patients visit a clinic in a year. What type of variable is 'number of visits'?

Accepted Answer

Discrete quantitative

Question 13

Which of the following is a key reason for understanding statistics in health sciences practice?

Accepted Answer

To better interpret research findings and apply them to patient care.

Question 14

A study records the ethnicity of patients. What is the best level of measurement for 'ethnicity'?

Accepted Answer

Nominal

Question 15

Which of the following best describes an inferential statistical analysis?

Accepted Answer

Drawing conclusions about a population based on sample data.

Question 16

A researcher wants to compare the average recovery time between two groups of patients receiving different treatments. Which type of statistical analysis is most appropriate?

Accepted Answer

Inferential statistics

Question 17

Which of the following is a correct formula for the mean of a sample?

Accepted Answer

$$\bar{x} = \frac{\sum x_i}{n}$$

Question 18

A study measures the number of cigarettes smoked per day by participants. What type of variable is this?

Accepted Answer

Discrete quantitative

Question 19

Which of the following best describes the relationship between research design and statistical analysis?

Accepted Answer

The research design determines which statistical tests are appropriate for the data.

Question 20

A researcher collects data on the following variables: gender, age, and pain score (rated 1-10). Which variable is measured at the ordinal level?

Accepted Answer

Pain score (1-10)

Introduction to Applied Statistics for Health Sciences: Research Process, Variables, and Statistical Analysis

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