Subject: Biostatistics and Research
Methodology
QUESTIONS AND CORRECT
DETAILED WITH RATIONALES
Already passed A+
Latest 2024/2025
Part-A
1. **What do you mean by biostatistics? Give its
importance in pharmacy.**
- **Answer:**
Biostatistics refers to the application of statistical
methods to the analysis of biological data. It plays a
crucial role in pharmacy by helping in the design of
experiments, the collection and interpretation of data, and
the evaluation of drug efficacy and safety. By applying
biostatistics, pharmacists can make informed decisions
regarding the effectiveness of new drugs and treatments,
ensuring that they meet regulatory standards and provide
the intended therapeutic benefits.
,2. **Describe the types of dispersion.**
- **Answer:**
Types of dispersion include:
- **Range:** The difference between the maximum and
minimum values in a dataset.
- **Variance:** The average of the squared differences
from the mean, which measures the spread of data points.
- **Standard Deviation:** The square root of variance,
providing a measure of dispersion relative to the mean in
the same units as the data.
3. **Calculate the range for individual series – X: 120, 170,
240, 100, 105, 205, 300, 160, 150, 180**
- **Answer:**
- **Range = Maximum Value - Minimum Value**
- **Range = 300 - 100 = 200**
4. **What is the significance of probability?**
- **Answer:**
Probability quantifies the likelihood of an event
occurring and is fundamental in statistical inference,
allowing researchers to make predictions and decisions
under uncertainty. In pharmacy, probability is used to
assess risks, evaluate drug effects, and determine the
likelihood of side effects or adverse reactions.
5. **Describe the properties of normal distribution.**
, - **Answer:**
- **Symmetrical:** The distribution is symmetric about
the mean, with equal probabilities on either side.
- **Bell-shaped:** The curve peaks at the mean and
tapers off symmetrically towards both extremes.
- **Mean, Median, and Mode:** All three measures are
equal in a normal distribution.
- **Asymptotic:** The tails of the curve approach but
never touch the horizontal axis.
#### **Part-B**
11. **a) Explain the applications, merits, and demerits of
correlation.**
- **Answer:**
- **Applications:** Used to measure the strength and
direction of the relationship between two variables, such
as drug dosage and response rate.
- **Merits:** Simple to calculate and interpret; useful
for identifying relationships that warrant further
investigation.
- **Demerits:** Does not imply causation; may be
affected by outliers and non-linear relationships.
**b) Calculate the Karl Pearson’s coefficient of
correlation for the following data:**
- **Data:**
Methodology
QUESTIONS AND CORRECT
DETAILED WITH RATIONALES
Already passed A+
Latest 2024/2025
Part-A
1. **What do you mean by biostatistics? Give its
importance in pharmacy.**
- **Answer:**
Biostatistics refers to the application of statistical
methods to the analysis of biological data. It plays a
crucial role in pharmacy by helping in the design of
experiments, the collection and interpretation of data, and
the evaluation of drug efficacy and safety. By applying
biostatistics, pharmacists can make informed decisions
regarding the effectiveness of new drugs and treatments,
ensuring that they meet regulatory standards and provide
the intended therapeutic benefits.
,2. **Describe the types of dispersion.**
- **Answer:**
Types of dispersion include:
- **Range:** The difference between the maximum and
minimum values in a dataset.
- **Variance:** The average of the squared differences
from the mean, which measures the spread of data points.
- **Standard Deviation:** The square root of variance,
providing a measure of dispersion relative to the mean in
the same units as the data.
3. **Calculate the range for individual series – X: 120, 170,
240, 100, 105, 205, 300, 160, 150, 180**
- **Answer:**
- **Range = Maximum Value - Minimum Value**
- **Range = 300 - 100 = 200**
4. **What is the significance of probability?**
- **Answer:**
Probability quantifies the likelihood of an event
occurring and is fundamental in statistical inference,
allowing researchers to make predictions and decisions
under uncertainty. In pharmacy, probability is used to
assess risks, evaluate drug effects, and determine the
likelihood of side effects or adverse reactions.
5. **Describe the properties of normal distribution.**
, - **Answer:**
- **Symmetrical:** The distribution is symmetric about
the mean, with equal probabilities on either side.
- **Bell-shaped:** The curve peaks at the mean and
tapers off symmetrically towards both extremes.
- **Mean, Median, and Mode:** All three measures are
equal in a normal distribution.
- **Asymptotic:** The tails of the curve approach but
never touch the horizontal axis.
#### **Part-B**
11. **a) Explain the applications, merits, and demerits of
correlation.**
- **Answer:**
- **Applications:** Used to measure the strength and
direction of the relationship between two variables, such
as drug dosage and response rate.
- **Merits:** Simple to calculate and interpret; useful
for identifying relationships that warrant further
investigation.
- **Demerits:** Does not imply causation; may be
affected by outliers and non-linear relationships.
**b) Calculate the Karl Pearson’s coefficient of
correlation for the following data:**
- **Data:**
