More DetailsIntroduction to Central TendencyData normally has a tendency to group around its middle numbers. So if you were to gather a random group of men, you will notice that while a few are quite tall and another few are short, most will be about the average height of the group. Some number in the middle of the heights of the group will... |
More DetailsNormal DistributionMost things in nature tend to follow the normal distribution. It has only one peak and is shaped like a bell so is often also refferred to as the"bell curve". Physicists sometimes refer to this distribution as the "Gaussian Distribution". |
More DetailsStatistical Hypothesis TestStastical hypothesis tests are used in decision making. This is done on the base of experimental data. There are generally two kinds of hypothesis null and alternative. |
More DetailsIntroduction to Regression AnalysisRegression analysis is a technique used to predict the values of a dependant variable based on the values of one or more independent varialbles. |
More DetailsIntroduction to SamplingA statistical sample is used to obtain information about the population from which the sample is taken. |
More DetailsLeft Tailed TestLet us take an example to illustrate this type of test. Say that a railway company has been told by experts that it will get at more than 50 passengers on its train on a particular route on an average throughout the year. The company wants to test this claim. One way to do this... |
More DetailsRight Tailed TestLet us take an example to illustrate this type of test. Say that a railway company wants to see whether it will get less than 50 passengers on its train on a particular route on an average throughout the year. In this case if we formulate the null hypothesis and the alternate hypothesis... |
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