Non-parametric Tests Unfortunately, it’s the first time that I learnt that Likert scale cannot be used together with t-test. According to my favorite Stat Wiki by Prof. Koji Yatani, Roughly speaking, there are two cases in which you want to use non-parametric test: Ordinal data: If your data are ordinal (like the results from Likert-scale…
What is P value?
P value is the probability that you are wrong if you reject the null hypothesis. or P value is the probability that you get equal or worse result if your experiment is right… or according to Wikipedia: For example, if you propose a hypothesis that Trump has more positive tweets than Hillary has, the your…
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