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HA: The Alternative Hypothesis. This is the hypothesis or claim which we initially assume to be false but which we may decide to accept if there is sufficient evidence. This procedure is familiar to us already from the legal system: “Innocent until proven guilty". The Null Hypothesis (Innocent) is only rejected in favour of the
Statistical inference is the act of generalizing from sample (the data) to a larger phenomenon (the population) with calculated degree of certainty. The prior chapter introduced the most important form of inference: estimation. This chapter introduces the second form of inference: null hypothesis significance tests (NHST), or
H0 is called the null hypothesis and HA is called the alternative hypothesis. The union of null and alternative hypothesis defines a hypothesis H ? ?=?0 ? ?A called the maintained hypothesis. • A hypothesis is called simple if it completely specify the probability distribution and otherwise com- posite. Example 1 Suppose
lFollowing is a five-step procedure for testing a hypothesis. 5 STEPS IN THE HYPOTHESIS TESTING PROCEDURE. 1. State the null hypothesis and the alternate hypothesis. Null Hypothesis – statement about the value of a population parameter. Alternate Hypothesis – statement that is accepted if evidence proves null.
The Concept of the Null Hypothesis. NRC 601. Research Concepts in Natural Resources. Department of Natural Resources Conservation. University of Massachusetts Amherst. Fall 2009
What is hypothesis testing? (cont.) Very important!! Note that failure to reject H0 does not mean the null hypothesis is true. There is no formal outcome that says. “accept H0." It only means that we do not have sufficient evidence to support H1.
There are two types of statistical hypotheses: Null Hypothesis (H0) – a statistical hypothesis that states that there is no difference between a parameter and a specific value, or that there is no difference between two parameters. Alternative Hypothesis (H1) – a statistical hypothesis that states the existence of a difference
C. The hypothesis actually to be tested is usually given the symbol H0, and is commonly referred to as the null hypothesis. As is explained more below, the null hypothesis is assumed to be true unless there is strong evidence to the contrary – similar to how a person is assumed to be innocent until proven guilty. D. The other
26 Feb 2009 In many sciences including for example, ecology, medicine, and psychology, null hypothesis significance testing (NHST) is the primary means by which the numbers comprising the data from some experiment are translated into conclusions about the question(s) that the experiment was designed to address
Testing Statistical Hypotheses . . . In the case of the jury trial, the favored assumption is that the person is innocent. In statistical inference, one also works with a favored assumption. This favored assump- tion is called the null hypothesis, which we will denote by H0. The “alternative" (or antithesis) to the null hy- pothesis is
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