HLTH 501
Biostatistics
Comprehensive Finals Review (Qns & Ans)
2025
1. Which of the following is a measure of central tendency?
- A. Standard deviation
- B. Variance
- C. Mean
- D. Range
- ANS: C. Mean
- Rationale: The mean is a measure of central tendency that
represents the average value of a dataset.
2. What is the primary purpose of inferential statistics?
©2024/2025
, - A. To describe the characteristics of a dataset
- B. To make predictions or inferences about a population based
on a sample
- C. To calculate the mean and median
- D. To determine the range of a dataset
- ANS: B. To make predictions or inferences about a
population based on a sample
- Rationale: Inferential statistics are used to make predictions
or inferences about a population based on data from a sample.
3. Which of the following is an example of a continuous
variable?
- A. Gender
- B. Blood pressure
- C. Eye color
- D. Marital status
- ANS: B. Blood pressure
- Rationale: Blood pressure is a continuous variable because
it can take on any value within a range.
4. What is the null hypothesis in hypothesis testing?
©2024/2025
, - A. The hypothesis that there is a significant effect or
difference
- B. The hypothesis that there is no significant effect or
difference
- C. The hypothesis that the sample size is too small
- D. The hypothesis that the data is normally distributed
- ANS: B. The hypothesis that there is no significant effect or
difference
- Rationale: The null hypothesis states that there is no
significant effect or difference between groups or variables.
5. Which statistical test is used to compare the means of two
independent groups?
- A. Chi-square test
- B. ANOVA
- C. Paired t-test
- D. Independent t-test
- ANS: D. Independent t-test
- Rationale: The independent t-test is used to compare the
means of two independent groups to determine if there is a
significant difference between them.
Fill-in-the-Blank Questions
©2024/2025
, 6. The measure of how spread out the values in a dataset are is
known as __________.
- ANS: Variability
- Rationale: Variability refers to the extent to which the
values in a dataset are spread out or dispersed.
7. The probability of rejecting the null hypothesis when it is true
is called __________.
- ANS: Type I error
- Rationale: A Type I error occurs when the null hypothesis is
incorrectly rejected, indicating a false positive result.
8. The __________ is the middle value of a dataset when the
values are arranged in ascending or descending order.
- ANS: Median
- Rationale: The median is the middle value of a dataset,
representing the central point of the data distribution.
9. The __________ test is used to determine if there is a
significant association between two categorical variables.
- ANS: Chi-square
- Rationale: The chi-square test is used to assess the
association between two categorical variables.
©2024/2025
Biostatistics
Comprehensive Finals Review (Qns & Ans)
2025
1. Which of the following is a measure of central tendency?
- A. Standard deviation
- B. Variance
- C. Mean
- D. Range
- ANS: C. Mean
- Rationale: The mean is a measure of central tendency that
represents the average value of a dataset.
2. What is the primary purpose of inferential statistics?
©2024/2025
, - A. To describe the characteristics of a dataset
- B. To make predictions or inferences about a population based
on a sample
- C. To calculate the mean and median
- D. To determine the range of a dataset
- ANS: B. To make predictions or inferences about a
population based on a sample
- Rationale: Inferential statistics are used to make predictions
or inferences about a population based on data from a sample.
3. Which of the following is an example of a continuous
variable?
- A. Gender
- B. Blood pressure
- C. Eye color
- D. Marital status
- ANS: B. Blood pressure
- Rationale: Blood pressure is a continuous variable because
it can take on any value within a range.
4. What is the null hypothesis in hypothesis testing?
©2024/2025
, - A. The hypothesis that there is a significant effect or
difference
- B. The hypothesis that there is no significant effect or
difference
- C. The hypothesis that the sample size is too small
- D. The hypothesis that the data is normally distributed
- ANS: B. The hypothesis that there is no significant effect or
difference
- Rationale: The null hypothesis states that there is no
significant effect or difference between groups or variables.
5. Which statistical test is used to compare the means of two
independent groups?
- A. Chi-square test
- B. ANOVA
- C. Paired t-test
- D. Independent t-test
- ANS: D. Independent t-test
- Rationale: The independent t-test is used to compare the
means of two independent groups to determine if there is a
significant difference between them.
Fill-in-the-Blank Questions
©2024/2025
, 6. The measure of how spread out the values in a dataset are is
known as __________.
- ANS: Variability
- Rationale: Variability refers to the extent to which the
values in a dataset are spread out or dispersed.
7. The probability of rejecting the null hypothesis when it is true
is called __________.
- ANS: Type I error
- Rationale: A Type I error occurs when the null hypothesis is
incorrectly rejected, indicating a false positive result.
8. The __________ is the middle value of a dataset when the
values are arranged in ascending or descending order.
- ANS: Median
- Rationale: The median is the middle value of a dataset,
representing the central point of the data distribution.
9. The __________ test is used to determine if there is a
significant association between two categorical variables.
- ANS: Chi-square
- Rationale: The chi-square test is used to assess the
association between two categorical variables.
©2024/2025
