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    Which statistical test should I use for my Likert-scale surveys?

    I have 2 surveys, both using a Likert-scale with only 4 points (strongly agree, agree, disagree, strongly disagree). Both surveys have 10 questions. The first survey has 25 responses and the second survey has 6 responses. There is only 1 group for each survey.
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    Mann Whitney or Wilcoxin test?

    Lets say I have two brands of a machine which do the same thing. I have a sample of participants who have each used the two machines, one after the other. I now want to find out if there is a difference between the machines in three of the measurements they have produced. I've firstly determined...
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    Please help... normal distribution of data and checking normality?

    Hi, I have a set of data which I would like to find whether it is parametric or non-parametric in order to find out which test to do next to compare differences between 2 groups. I have been told to do a histogram followed by Shapiro Wilk test which I have done. The problem is that the...