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  1. Null hypothesis - Wikipedia


    Principle. Hypothesis testing requires constructing a statistical model of what the data would look like, given that chance or random processes alone were responsible for the results. The hypothesis that chance alone is responsible for the results is called the null hypothesis.The model of the result of the random process is called the distribution under the null hypothesis.

  2. Null Hypothesis Definition and Example


    Null Hypothesis What is the null hypothesis? Below is a definition of the null hypothesis. Null Hypothesis Definition The null hypothesis is the opposite of the alternative

  3. What is a null hypothesis? definition and meaning ...


    A proposition that undergoes verification to determine if it should be accepted or rejected in favor of an alternative proposition. Often the null hypothesis is expressed as "There is no relationship between two quantities.". For example, in market research, the null hypothesis would be "A ten-percent increase in price will not adversely affect the sale of this product."

  4. Null Hypothesis - The Commonly Accepted Hypothesis


    The simplistic definition of the null is as the opposite of the alternative hypothesis, H 1, although the principle is a little more complex than that.. The null hypothesis (H 0) is a hypothesis which the researcher tries to disprove, reject or nullify.. The 'null' often refers to the common view of something, while the alternative hypothesis is what the researcher really thinks is the cause ...

  5. Statistical hypothesis testing - Wikipedia


    Variations and sub-classes. Statistical hypothesis testing is a key technique of both frequentist inference and Bayesian inference, although the two types of inference have notable differences.Statistical hypothesis tests define a procedure that controls (fixes) the probability of incorrectly deciding that a default position (null hypothesis) is incorrect.

  6. Null and Alternative Hypothesis | Real Statistics Using Excel


    Jessica, If you reject the null hypothesis, then you would conclude that there is a significant difference between the scores of patients being tested with those know to have dementia.

  7. Null Hypothesis - Investopedia


    The null hypothesis is the initial statistical claim that the population mean is equivalent to the claimed. For example, assume the average time to cook a specific brand of pasta is 12 minutes.

  8. Null Hypothesis | Definition of Null Hypothesis by Merriam ...

    https://www.merriam-webster.com/dictionary/null hypothesis

    : a statistical hypothesis to be tested and accepted or rejected in favor of an alternative specifically: the hypothesis that an observed difference (as between the means of two samples) is due to chance alone and not due to a systematic cause

  9. Hypothesis testing - Handbook of Biological Statistics


    Summary. One of the main goals of statistical hypothesis testing is to estimate the P value, which is the probability of obtaining the observed results, or something more extreme, if the null hypothesis were true. If the observed results are unlikely under the null hypothesis, your reject the null hypothesis.

  10. How to Set Up a Hypothesis Test: Null versus Alternative ...


    When you set up a hypothesis test to determine the validity of a statistical claim, you need to define both a null hypothesis and an alternative hypothesis. Researchers often challenge claims about population parameters. You may hypothesize, for example, that the actual proportion of women who have ...