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Physics Wallah, or "PW", was founded in 2016 as a YouTube channel hosted by Alakh Pandey, an educator hailing from Prayagraj, Uttar Pradesh.The channel was initially focused on teaching the physics curriculum for the Joint Entrance Examinations (JEE), a popular entrance examination in India. [2]
The third and fourth phases of the JEE-Main examinations were later held on 20 July – 3 August and 26 August – 2 September, respectively. The JEE-Advanced exam was held on 3 October 2021. JEE-Advanced 2022 was scheduled to be held on 3 July 2022 in the usual two sessions - Morning and Afternoon (both compulsory).
Dave Kerby (2014) recommended the rank-biserial as the measure to introduce students to rank correlation, because the general logic can be explained at an introductory level. The rank-biserial is the correlation used with the Mann–Whitney U test, a method commonly covered in introductory college courses on statistics. The data for this test ...
c) The incorrect response will yield -1/2 (25% negative) marks for each question. d) For any combination of more than one option, even if it contains the correct option, the said answer will be treated as incorrect and will yield -1/2 (25% negative) marks. e) Not attempting the question will fetch zero mark. Category-3
The positive predictive value (PPV), or precision, is defined as = + = where a "true positive" is the event that the test makes a positive prediction, and the subject has a positive result under the gold standard, and a "false positive" is the event that the test makes a positive prediction, and the subject has a negative result under the gold standard.
The modified signed-rank sum , the modified positive-rank sum +, and the modified negative-rank sum are defined analogously to , +, and but with the modified ranks in place of the ordinary ranks. The probability that the sum of two independent F {\displaystyle F} -distributed random variables is positive can be estimated as 2 T 0 + / ( n ( n ...
A simple predictor–corrector method (known as Heun's method) can be constructed from the Euler method (an explicit method) and the trapezoidal rule (an implicit method). Consider the differential equation
The Mann–Whitney test (also called the Mann–Whitney–Wilcoxon (MWW/MWU), Wilcoxon rank-sum test, or Wilcoxon–Mann–Whitney test) is a nonparametric statistical test of the null hypothesis that, for randomly selected values X and Y from two populations, the probability of X being greater than Y is equal to the probability of Y being greater than X.