Assignment 1: Increase of rainfall due to climate change and its relation with forest

[dropcap]C[/dropcap]limate change as one popular issues in last decades, it’s affect global average surface temperature and increased over 20th century by about 0.60 C. Forest are likely to experience dramatic changes as a consequence of increment rainfall by climate change. Forest directly affect climate change at the global scale by altering earth’s albedo, hydrological, regimes and atmospheric CO2 .Forest also affect climate at a local scale by altering temperature, humidity and solar radiation (Graham, 1990).

Another serious effect of climate change, related to forest stability is it increased total rain and rain intensity. According to report by Climate Change 2011: The Scientific Basis, Tropical land-surface precipitation measurements indicate that precipitation likely has increased by about 0.2 to 0.3%/ decade over the 20th century. Direct measurements of precipitation and model re analyses of inferred precipitation indicate that rainfall has also increased over large parts of the tropical ocean.

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Lecture note Biostatistic #4: Probability

This is my fourth lecture notes about biostatistic, the previous notes, told us about the data presentation ( graphs, polygon, bar chart, histogram and etc. Probability topic will discuss about what happen when we roll a die or tossing a coin, in my opinion this topic will use to help us when we estimate the real distribution in population using several sample. the professor said that this topic is useful to expect the probability when we doing research in large population and doesn’t know about the real population distribution.

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Lecture Note: Presenting Data, tables, graph, summary

This morning is the 3rd meeting in this class, the material is more specific in how to process our data and the objective is we can understand about the whole general future of data.  After we knew about many type of data, the next step is make analysis using tables, graph and summary.


Tables show the frequency distribution, for nominal and ordinal data, a frequency distribution consist of a set od classes or categories along with numerical counts. If we using tables for our data presentation it will help us to show either summary or details data. the aims of summary data is showing numerical data and dont’ forget to show the number of samples examines, not only presenting the ration but also number of samples.

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Lecture note: Biostatistic #2: Types of Data

This is lecture note for 2nd meeting, Tuesday, Oct 12th 2011. Today we study about Biostatistics and techniques in this kind of knowledge. like the previous post, statistic is the activity involving obtain data, analyze data, and present data.

Statistic is the summary of  information (data) in a meaningful fashion, and its appropriate presentation.

Statistic is the population if a plausible model explaining the mechanism that generates the data, with the ultimate goal to extrapolate and predict data under circumstance beyond the current experiment.

Biostatistic is the segment of statistic that deals with data arising from biological process or medical experiments

We start to know about descriptive statistic, the professor said that this is the point in descriptive statistic

  • A means of organizing and summarizing observations
  • They provide us with an overview of the general futures of data, this point like the quotes above ( predict and forecast).
  • Tables, graphs, and numerical summary measures. Tables and graph is uses for make us easy to understand about the summary that we made.

lecture note: Fundamental of Agricultural Sciences: Biostatistic

This lecture was delivered by Prof. Keiji Takasu form Agri-Bio Research Laboratory. This class will provide lecture about biostatistic, in my first impression, biostatistic is field of statistic which it applied in sciences to solve the problem in real. Actually I prepare also if professor asking me about this one, but i don’t have guts enough for cheer up :D, so that i write down in this lecture note.

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