Perform commonly used hypothesis tests as appropriate

Reference no: EM133662156

Biostatistics

Learning Outcome 1: Select an appropriate biostatistical methodology to analyse health. biology, and/or environmental data.
Learning Outcome 2: Perform commonly used hypothesis tests as appropriate.
Learning Outcome 3: Conduct statistical analyses using a specialised software package.
Learning Outcome 4: Report statistical findings in a scientific manner, consistent with the study context.

Question 1

Many areas of science are benefitting from consideration of the knowledge passed on from generation to generation, often known as 'traditional knowledge. Researchers were interested in understanding the attitude's of postgraduate students in relation to the potential for traditional knowledge to be used in their career after they graduated. Researchers surveyed 30 university students at the start of their course and after one year of working in a job related to their course using scale from 0 to 4, where 0 = strongly disagreed with the statement that 'traditional knowledge could be useful in their discipline' and 4 = strongly agreed with the statement. Determine if students attitude towards with regards to the use of traditional knowledge in their professional practice increased after they commenced working, compared to when they first started, using statistical analysis to support your conclusions with regards to the research question. Use the data in Q1 worksheet with an alpha = 0.05.

Question 2
A researcher is studying the effect of a three different, commercially available, fertilisers on the growth of tomato plants. Researchers randomly assigned 9 of the same type of tomato plants, which were all the same height at the start of the test, to each of the three groups which they labelled Fertilizer 1, Fertilizer 2, and Fertilizer 3. After 8 weeks, the heights of the plants were recorded. The researchers wanted to determine if there are any differences in the mean plant heights between the different fertilizers. Analyse the data and make a conclusion based on your analysis. Use level of significance of 0.05 for this analysis, with the data provided in the Q2 worksheet in your Excel file.

Question 3
In efforts to reduce the time taken for food and organic wastes (FOGO) to be converted to mulch which could then be used for the revegetation of native plants and horticultural products. Commercial mulch producers investigated if the temperature of the mulch during processing influences the time it takes for the mulch to be free from pathogens (pasteurised). The commercial producers set up a trial, in which on large batch of FOGO was split into 60 individual piles, each 1m3 in size. Thirty piles were covered in plastic so that the core of the mulch piles achieved 65°C, whilst the 30 uncovered samples only reached 55°C. Data were collected on the time the mulch took to be free from pathogens (in days). Use statistical analysis to evaluate whether the covering of the mulch with plastic, resulting in higher temperatures, has an effect on the time taken for pasteurisation to occur. The data for this question can be found in the Q3 worksheet of the data file. Use alpha = 0.05.

Reference no: EM133662156

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