HAC511C - Biostatistics and Research Methodology Assignment

Assignment Task

A. 1. In a clinical trial the researchers were intended to measure the effectiveness of three drugs on Iron intake (mg) among 10 pregnant women in each group. They wish to find out whether this data is sufficient to conclude that there is significant difference in mean iron intake among all three drugs.

Drug I          11.5     19.5      18.5      12.5      18.5      16.5      26.5      18.5     16.0      24.5       

Drug II         27.0     28.0      22.0      21.0      15.0      19.5      20.0      26.0     30.0      28.5

Drug III        28.0     30.0      26.0      30.0      24.5      28.5      26.0      30.0     27.0      25.5

Does this data suggest a significant difference in the mean iron intake for all three drugs at 5% level of significance? (Copy the screen shots from SPSS on your report)

2. KH is a 1000 bedded general hospital with trauma care centre. The following data relates to the duration of hospitalization (in days) of patients depending on their disease condition.

2          3        1      19       5           7         21       8          45       10

24        6      90      9         17        49       1         5         52       60

As a data analyst you are requested by the hospital authority to help them in finding the summary statistics of the duration of hospitalization. Also, they wish to know the best measures to describes the above data.

B. A company manufactures impellers for use in jet-turbine engines. One of the operations involves grinding a particular surface finish of a titanium alloy component. Two different grinding processes can be used and both processes can produce parts at identical mean surface roughness. The manufacturing engineer would like to select the process having the least variability in surface roughness. A random sample of n1=12 parts from the first process results in a sample mean of 25.58 microinches with a standard deviation of S1 = 5.1 microinches and the second process from n2=15 parts results in mean of 22.31 microinches with a standard deviation of S2= 4.7 microinches. Test whether the grinding process 2 has lower surface roughness compared to grinding process 1 at

1. 1% level of significance (Critical value is 1.701)

2. 5% level of significance (Critical value is 2.467)

3. What difference do you find between the above two levels of significance?

4. Is there a need for P-value in such case? If so what would be the approximate P-value for this problem

5. Find a 95% and 99% confidence interval for difference in population means.

6. Interpret your results taking into consideration the Null hypothesis, Confidence interval and P-value.

C. Synopsis on the topic HAI The Lancet Global -Health-care-associated infection surveillance in IndiaIn India, a large segment of the population seeks in-patient health-care at secondary or district-level health facilities in public and private sectors, many of which have inadequate infection prevention and control measures. The major barriers to infection prevention and control implementation are scarcity of dedicated and trained staff, availability and inappropriate use of PPE, and sanitary and hygiene measures, compounded with patient overcrowding. The widespread transmission of infection in health facilities during the ongoing COVID-19 pandemic underscores the need for strengthening infection prevention and control practices.In the past decade, there have been governmental initiatives, such as Kayakalp, aimed at improving and promoting the cleanliness, hygiene, waste management, and infection control practices in public health-care facilities in India. Although it is desirable that the national HAI surveillance system is eventually extended to district-level hospitals, the immediate priority should be to ensure that the minimum requirements of infection prevention and control are in place in these hospitals. The eventual outcomes of implementing evidence-based, best infection prevention and control practices will be a substantial reduction in HAIs and an improvement in the overall health-care quality.

Write a research synopsis consisting of:

1. Introduction

2. Need of the study

3. Literature Review

4. Title and Aim of the study

5. Objectives- Minimum three

6. Hypothesis-Minimum two

7. Methodology of the study (Research Design)

• Sampling
• Population size
• Data collection methodology-Both Qualitative and Quantitative
• Data Analysis methods

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