ঘটনাটি ১৯৮৬ সালের। রাশিয়াতে চেরনোবিল পারমানবিক শক্তি কেন্দ্রে ঘটে এক ভয়াবহ বিস্ফোরণ। এতে তাৎক্ষণিকভাবে মৃত্যু ঘটে বহু মানুষের। পাশাপাশি  ধ্বংস হয়ে যায় সেখানকার গাছপালা , পশু-পাখি এবং অন্যান্য জীব। শুধু তাই নয়, আজ পর্যন্ত এর তেজস্ক্রিয়তার প্রভাবে এলাকাটি কোনো জীব বসবাসের অযোগ্য। যাদের তৎক্ষনাত মৃত্যু ঘটে নি, তারাও সেখানকার চরম …

Plants can see us. They can monitor their visible environment. They can see if you’re wearing a red or blue shirt. They know if you’re moving them from one place of your house to another. When you take a picture turning the flash on for a better and clearer image, …

In the year 1986, a horrifying incident took place. It killed many instantly (who were very close to the nuclear reactor). As well as kept on affecting several many living beings including plants, wild and domestic animals. The extreme radioactive environment affected the people whoever was still living in that …

Test of Significance The mathematical methods by which the probability of relative frequency of an observed difference occurring by chance, is found, are called tests of significance. It may be a difference between means or proportions of sample and universe or between the estimates of experiment and control groups.  Thus, …

Future of Earth from Mummified Plants In an ancient lake bed in the Southern Hemisphere, scientists studying fossil leaves found out the mechanism of the plants living during the Miocene Epoch. The world used to have an elevated level of carbon dioxide in the atmosphere. With an increased rate of …

All living things, as well as human beings, are made up of cells. Some organisms have only one cell during their whole lifespan by which they carry out all the physiological processes they require to survive. These are unicellular organisms. For instance, bacteria, yeast, etc. In contrast, there are also …

Range The range consists of a bunch of data that shows the distinction between the highest and lowest values among the data set. So as to seek out the range, it’s necessary to first order the data from lowest to highest. Then  we have to subtract the smallest value from the …

There are two main methods of presenting data of a variable character or a variable. A) Tabulation/Tabular Presentation B) Drawing/Graphical Presentation Tabulation Tabulation is a device for presenting data from a mass of statistical data. Preparation of frequency distribution table is the first requirement for that. Tables are often simple …

Average  The average value of a characteristic is the one central value around which all other observations are distributed. In any large series, nearly 50% of observations lie above the central value whereas the other 50% lie below the central value. It indicates how the values lie close to the …

Objectives of this article To understand What is statistics What is biostatistics Scopes of statistics What is variable What is a random variable Types of variables What is a qualitative or discrete variable What is a quantitative or continuous variable Practical examples of qualitative or quantitative variables Statistics Statistics is …