Biostatistics and Research Methodology — Winter 2024

What is Biostatistics? Discuss types of statistics and explain frequency distribution.

Assay results for 10 randomly selected tablets from a batch are given below, 101.8,104.5,102.6,100.7,99.8,106.3,104.9,100.6,103.8, 105.0 Calculate the sample standard deviation of the above data.

Explain the following terms:

Mode

Range

Variance

Dispersion

Geometric mean

Powder compacts for 8 observations were prepared at different compaction pressure and hardness of tablet and following data were obtained. Find correlation coefficient between compaction pressure and hardness of tablet Pressure 0.25 0.75 1 1.5 2 2.5 3 (tons) Hardness 1 1.3 1.9 2.6 2.8 3.3 4.2 5.3 (Kg)

What is the need for design of experiments? Discuss experimental design techniques?

Give a note on Poisson’s distribution.

What is t-test? Explain different types of t-tests.

Write a note on Wilcoxon Rank Sum test.

Give the difference between one way ANOVA and two way ANOVA.

Give differance between:

Type Ierror and Type II error

Standard deviation and Standard error of mean

Give a note on various types of sampling methods.

Explain hypothesis testing in the simple regression model.

What are probabilities? Explain normal distribution in detail.

What is Non-parametric test? discuss on Kruskal-Wallis test.

What is SPSS? Write down its applications in biostatistics. Page 1 of Q. 6 (a) Explain the following terms:

Sample

Population

Large sample

Small sample

Null hypothesis

Explain the concept of factorial design in detail.

Explain fitting the lines of regression of y = a + bx and x = a + by in regression analysis.

Write a note on the central composite design. Page 2 of