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  2. Happy number - Wikipedia

    en.wikipedia.org/wiki/Happy_number

    A number which is not happy is called sad or unhappy. More generally, a b {\displaystyle b} - happy number is a natural number in a given number base b {\displaystyle b} that eventually reaches 1 when iterated over the perfect digital invariant function for p = 2 {\displaystyle p=2} .

  3. Binomial test - Wikipedia

    en.wikipedia.org/wiki/Binomial_test

    Note that to do this we cannot simply double the one-tailed p-value unless the probability of the event is 1/2. This is because the binomial distribution becomes asymmetric as that probability deviates from 1/2. There are two methods to define the two-tailed p-value.

  4. Binomial distribution - Wikipedia

    en.wikipedia.org/wiki/Binomial_distribution

    In probability theory and statistics, the binomial distribution with parameters n and p is the discrete probability distribution of the number of successes in a sequence of n independent experiments, each asking a yes–no question, and each with its own Boolean-valued outcome: success (with probability p) or failure (with probability q = 1 − p).

  5. Probability of success - Wikipedia

    en.wikipedia.org/wiki/Probability_of_success

    The probability of success (POS) is a statistics concept commonly used in the pharmaceutical industry including by health authorities to support decision making. The probability of success is a concept closely related to conditional power and predictive power. Conditional power is the probability of observing statistical significance given the ...

  6. Predictive probability of success - Wikipedia

    en.wikipedia.org/wiki/Predictive_probability_of...

    Use the newly completed dataset to calculate criteria used to calculate success which could be things like p-values, posterior probabilities, etc. This can then be used to categorized if a trial was a success or not. These three steps then get repeated a total of n number of times. The PPOS is determined by getting the proportion of trials that ...

  7. Statistical hypothesis test - Wikipedia

    en.wikipedia.org/wiki/Statistical_hypothesis_test

    [48] [49] [50] In every year, the number of males born in London exceeded the number of females. Considering more male or more female births as equally likely, the probability of the observed outcome is 0.5 82, or about 1 in 4,836,000,000,000,000,000,000,000; in modern terms, this is the p-value. Arbuthnot concluded that this is too small to be ...

  8. What is 'lemonading'? Why playful people are better at coping ...

    www.aol.com/lifestyle/lemonading-why-playful...

    In February 2021, researchers surveyed 503 U.S. adults and asked them about their experiences during the COVID-19 pandemic — including social support, their perceptions of infection risk ...

  9. Outline of probability - Wikipedia

    en.wikipedia.org/wiki/Outline_of_probability

    The certainty that is adopted can be described in terms of a numerical measure, and this number, between 0 and 1 (where 0 indicates impossibility and 1 indicates certainty) is called the probability. Probability theory is used extensively in statistics , mathematics , science and philosophy to draw conclusions about the likelihood of potential ...