What statistical analysis should I use for Likert-Scale data?


Appropriate statistics are Mann-whitney U test and Chi sqaure test.

Sometime people use  the t-test to compare responses on likert scale but it is not appropratie

Both the t-test and the MWW can be used.  See: https://www.researchgate.net/publication/266212127_Five-Point_Likert_Items_t_test_versus_Mann-Whitney-Wilcoxon

In conclusion, for five-point Likert items, the t test and MWW generally have similar power, and researchers do not have to worry about finding a difference whilst there is none in the population.

Article Five-Point Likert Items: t Test Versus Mann–Whitney–Wilcoxon

Souce: NovoPro    2018-03-31